fix: Fix healthcheck using deprecated functions

[cdevoogd]

Description

This fixes :checkhealth from showing deprecation warnings in 0.10.0+.

In neovim 0.10, the vim.health.report_* functions were deprecated. It is recommended to use the new functions which use the same name without the report_ prefix (i.e. vim.health.start, vim.health.ok, etc). The deprecated functions will be removed in 0.11.

Testing

I just set up a minimal config that loads my local version of the plugin. Then I used bob to switch between versions to test from 0.7 to 0.10

vim.opt.runtimepath:prepend("~/src/nvim-go")

This is what the current main branch shows on 0.10.0 before any fixes. There are also additional warnings and stack traces in :messages.

go: require("go.health").check()

- WARNING vim.health.report_start() is deprecated, use vim.health.start() instead. :help |deprecated|
  Feature will be removed in Nvim 0.11

Binaries ~
- WARNING vim.health.report_info() is deprecated, use vim.health.info() instead. :help |deprecated|
  Feature will be removed in Nvim 0.11
- Go installed.
- Tool installed: gopls
- Tool installed: golint
- Tool installed: revive
- Tool installed: goimports
- Tool installed: gofumpt
- Tool installed: errcheck
- Tool installed: staticcheck
- Tool installed: golangci-lint
- Tool installed: gomodifytags
- Tool installed: quicktype
- Tool installed: gotests
- Tool installed: iferr
- WARNING vim.health.report_ok() is deprecated, use vim.health.ok() instead. :help |deprecated|
  Feature will be removed in Nvim 0.11
- OK No issues found

I then tested the changes on 0.10.0, 0.9.0, 0.8.0, and 0.7.2 (that's the first release with a mac binary that supports ARM) since the project's readme mentions working on version >= 0.7. There are no more deprecation warnings and no more warnings in :messages

go: require("go.health").check()

Binaries ~
- Go installed.
- Tool installed: gopls
- Tool installed: golint
- Tool installed: revive
- Tool installed: goimports
- Tool installed: gofumpt
- Tool installed: errcheck
- Tool installed: staticcheck
- Tool installed: golangci-lint
- Tool installed: gomodifytags
- Tool installed: quicktype
- Tool installed: gotests
- Tool installed: iferr
- OK No issues found

[crispgm]

Thank you very much!