refactor: replace deprecated io/ioutil package

[blue-troy]

io/ioutil package is deprecated

Proposed commit message

As of Go 1.16, the same functionality is now provided by package io or package os, and those implementations should be preferred. Successor functionality in io or os is more performant than the deprecated functionality in io/ioutil.

Checklist

• My code follows the style guidelines of this project
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Related issues

• Closes replace depricated io/ioutil #37466

[cla-checker-service]

💚 CLA has been signed

[mergify]

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branches, such as:

• backport-v8./d.0 is the label to automatically backport to the 8./d branch. /d is the digit

[elasticmachine]

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• Start Time: 2023-12-20T07:46:50.024+0000

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[blue-troy]

There is some lint issue right now, but not caused by this pr.

[belimawr]

@blue-troy thanks for the PR!

There is some lint issue right now, but not caused by this pr.

If the lint issues are not from your code, you can ignore them.

[belimawr]

/test

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[miltonhultgren]

Stack Monitoring modules LGTM

[efd6]

It would be helpful for review to have a description of how the mutations here were performed. If it was done purely mechanically (hopefully it was), for example with a set of gofmt rewrites and a goimports cleanup, then the code used to make the changes can be included in the commit message to make use of git-generate.

[blue-troy]

It would be helpful for review to have a description of how the mutations here were performed. If it was done purely mechanically (hopefully it was), for example with a set of gofmt rewrites and a goimports cleanup, then the code used to make the changes can be included in the commit message to make use of git-generate.

For most of the case is just replace ioutil package to other package. but ioutil.ReadDir replaced with os.ReadDir returns a different struct:

before:

	contents, err := ioutil.ReadDir(src)
	if err != nil {
		return fmt.Errorf("failed to read dir %v: %w", src, err)
	}

after:

	contents := make([]fs.FileInfo, 0, len(contentEntries))
	for _, entry := range contentEntries {
		content, err := entry.Info()
		if err != nil {
			return fmt.Errorf("failed to stat %v: %w", entry.Name(), err)
		}
		contents = append(contents, content)
	}

this pr is not generate by script for some import package issue.

[efd6]

@blue-troy Ideally, the mechanical and manual changes would be separate. I took a look at the break down of changes and the mechanical changes touch 195 files while the manual changes only alter 15. If they are separate greater care can be applied to the review of the manual changes.

In cases where stdout and stderr are assigned io.Discard the assignment can either be removed (if first assignment) or replaced with nil since nil exec.Cmd.{Stdout,Stderr} are already the bit bucket.

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b refactor/ioutil upstream/refactor/ioutil
git merge upstream/main
git push upstream refactor/ioutil

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b refactor/ioutil upstream/refactor/ioutil
git merge upstream/main
git push upstream refactor/ioutil

[elasticmachine]

Pinging @elastic/security-service-integrations (Team:Security-Service Integrations)

[pierrehilbert]

Setting back to draft until the conflict are fixed.