Clarify unsupported Go versions in README and error messages

[williandandrade]

What version of Go, VS Code & VS Code Go extension are you using?

Version Information

• Run go version to get version of Go from the VS Code integrated terminal.
  • go version go1.18 darwin/arm64
• Run gopls -v version to get version of Gopls from the VS Code integrated terminal.
  • N/A
• Run code -v or code-insiders -v to get version of VS Code or VS Code Insiders.
  • 1.89.1
  • dc96b837cf6bb4af9cd736aa3af08cf8279f7685
  • arm64
• Check your installed extensions to get the version of the VS Code Go extension
  • v0.41.4
• Run Ctrl+Shift+P (Cmd+Shift+P on Mac OS) > Go: Locate Configured Go Tools command.

# Tools Configuration


## Environment

GOBIN: undefined
toolsGopath: 
gopath: /Users/wa/.asdf/installs/golang/1.18/packages
GOROOT: /Users/wa/.asdf/installs/golang/1.18/go
PATH: /Users/wa/.asdf/installs/golang/1.18/go/bin:/Users/wa/google-cloud-sdk/bin:/Users/wa/.asdf/shims:/opt/homebrew/opt/asdf/libexec/bin:/Users/wa/google-cloud-sdk/bin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/Applications/Wireshark.app/Contents/MacOS:/usr/local/go/bin:/Applications/iTerm.app/Contents/Resources/utilities:/Users/wa/Library/Application Support/JetBrains/Toolbox/scripts:/opt/homebrew/bin:/opt/homebrew/sbin:/opt/homebrew/bin:/opt/homebrew/sbin
PATH (vscode launched with): /Users/wa/google-cloud-sdk/bin:/Users/wa/.asdf/shims:/opt/homebrew/opt/asdf/libexec/bin:/Users/wa/google-cloud-sdk/bin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/Applications/Wireshark.app/Contents/MacOS:/usr/local/go/bin:/Applications/iTerm.app/Contents/Resources/utilities:/Users/wa/Library/Application Support/JetBrains/Toolbox/scripts:/opt/homebrew/bin:/opt/homebrew/sbin:/opt/homebrew/bin:/opt/homebrew/sbin

## Tools

	go:	/Users/wa/.asdf/installs/golang/1.18/go/bin/go: go version go1.18 darwin/arm64

	gopls:	not installed
	gotests:	/Users/wa/.asdf/installs/golang/1.18/go/bin/gotests	(version: v1.6.0 built with go: go1.18)
	gomodifytags:	/Users/wa/.asdf/installs/golang/1.18/go/bin/gomodifytags	(version: v1.16.0 built with go: go1.18)
	impl:	/Users/wa/.asdf/installs/golang/1.18/go/bin/impl	(version: v1.1.0 built with go: go1.18)
	goplay:	/Users/wa/.asdf/installs/golang/1.18/go/bin/goplay	(version: v1.0.0 built with go: go1.18)
	dlv:	/Users/wa/.asdf/installs/golang/1.18/go/bin/dlv	(version: v1.22.1 built with go: go1.18)
	staticcheck:	/Users/wa/.asdf/installs/golang/1.18/packages/bin/staticcheck	(version: v0.3.3 built with go: go1.18)

## Go env

Workspace Folder (go): /Users/wa/projects/go

	GO111MODULE=""
	GOARCH="arm64"
	GOBIN=""
	GOCACHE="/Users/wa/Library/Caches/go-build"
	GOENV="/Users/wa/Library/Application Support/go/env"
	GOEXE=""
	GOEXPERIMENT=""
	GOFLAGS=""
	GOHOSTARCH="arm64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/wa/.asdf/installs/golang/1.18/go/pkg/mod"
	GONOPROXY=""
	GONOSUMDB=""
	GOOS="darwin"
	GOPATH="/Users/wa/.asdf/installs/golang/1.18/packages"
	GOPRIVATE=""
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/Users/wa/.asdf/installs/golang/1.18/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/Users/wa/.asdf/installs/golang/1.18/go/pkg/tool/darwin_arm64"
	GOVCS=""
	GOVERSION="go1.18"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/wa/projects/go/go.mod"
	GOWORK=""
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/bn/6lg_h65j28l9wklnqv94jp9c0000gn/T/go-build3642746910=/tmp/go-build -gno-record-gcc-switches -fno-common"

Describe the bug

Can't use the extension with Go 1.18 because gopls@latest have a dependency to atomic.Int32.

2024-05-27 12:56:41.704 [info] Tools environment: GOPATH=/Users/wa/.asdf/installs/golang/1.18/go
2024-05-27 12:56:41.704 [info] Installing 1 tool at /Users/wa/.asdf/installs/golang/1.18/go/bin
2024-05-27 12:56:41.704 [info]   gopls
2024-05-27 12:56:41.704 [info] 
2024-05-27 12:56:42.418 [info] Installing golang.org/x/tools/gopls@latest FAILED
2024-05-27 12:56:42.418 [info] {
 "code": 2,
 "killed": false,
 "signal": null,
 "cmd": "/Users/wa/.asdf/installs/golang/1.18/go/bin/go install -v golang.org/x/tools/gopls@latest",
 "stdout": "",
 "stderr": "golang.org/x/tools/gopls/internal/cache\n# golang.org/x/tools/gopls/internal/cache\n../../.asdf/installs/golang/1.18/go/pkg/mod/golang.org/x/tools/gopls@v0.15.3/internal/cache/analysis.go:389:23: undefined: atomic.Int64\n../../.asdf/installs/golang/1.18/go/pkg/mod/golang.org/x/tools/gopls@v0.15.3/internal/cache/analysis.go:525:25: undefined: atomic.Int32\n../../.asdf/installs/golang/1.18/go/pkg/mod/golang.org/x/tools/gopls@v0.15.3/internal/cache/analysis.go:526:25: undefined: atomic.Int32\n"
}
2024-05-27 12:56:42.421 [info] 
2024-05-27 12:56:42.421 [info] 1 tools failed to install.

2024-05-27 12:56:42.421 [info] gopls: failed to install gopls(golang.org/x/tools/gopls@latest): Error: Command failed: /Users/wa/.asdf/installs/golang/1.18/go/bin/go install -v golang.org/x/tools/gopls@latest
golang.org/x/tools/gopls/internal/cache
# golang.org/x/tools/gopls/internal/cache
../../.asdf/installs/golang/1.18/go/pkg/mod/golang.org/x/tools/gopls@v0.15.3/internal/cache/analysis.go:389:23: undefined: atomic.Int64
../../.asdf/installs/golang/1.18/go/pkg/mod/golang.org/x/tools/gopls@v0.15.3/internal/cache/analysis.go:525:25: undefined: atomic.Int32
../../.asdf/installs/golang/1.18/go/pkg/mod/golang.org/x/tools/gopls@v0.15.3/internal/cache/analysis.go:526:25: undefined: atomic.Int32

Steps to reproduce the behavior:

1. Install go@1.18 from scratch
2. Install the extension in VSCode
3. Try to install the tools by opening some go file or go.mod

[williandandrade]

related to: #3412

[hyangah]

Use go.toolsManagement.go setting to tell the extension to use a newer version of go when building tools. https://github.com/golang/vscode-go/wiki/settings#gotoolsmanagementgo
Or, manually install the right version of gopls and tools suitable for go 1.18.

Will update README that users need go1.19+ if they want the extension to handle tools installation.

[gopherbot]

Change https://go.dev/cl/588757 mentions this issue: extension/src: require go1.19+ for tools installation