[9.1] (backport #10218) Fix troubleshooting message URL for versions after 9.x

[mergify]

What does this PR do?

Ensure the docs URL in the troubleshoot message matches the correct release version.
The docs for 9.0+ don't refer to a specific version anymore: https://www.elastic.co/docs/troubleshoot/ingest/fleet/common-problems, so the URL returned to the user in the error output is invalid.

Checklist

• I have read and understood the pull request guidelines of this project.
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• [ ] 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/fragments using the changelog tool
• [ ] I have added an integration test or an E2E test

Related issues

• Closes Troubleshooting message generates invalid URL in 9.x #10119

---

This is an automatic backport of pull request #10218 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of b74942a has failed:

On branch mergify/bp/9.1/pr-10218
Your branch is up to date with 'origin/9.1'.

You are currently cherry-picking commit b74942add.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	new file:   changelog/fragments/1759335344-fix-troubleshooting-message-url-for-versions-after-9.yaml
	modified:   internal/pkg/agent/cmd/apply_flavor.go
	modified:   internal/pkg/agent/cmd/common.go
	modified:   internal/pkg/agent/cmd/container.go
	modified:   internal/pkg/agent/cmd/diagnostics.go
	modified:   internal/pkg/agent/cmd/inspect.go
	modified:   internal/pkg/agent/cmd/install.go
	modified:   internal/pkg/agent/cmd/logs.go
	modified:   internal/pkg/agent/cmd/privileged.go
	modified:   internal/pkg/agent/cmd/reexec_windows.go
	modified:   internal/pkg/agent/cmd/run.go
	modified:   internal/pkg/agent/cmd/status.go
	modified:   internal/pkg/agent/cmd/uninstall.go
	modified:   internal/pkg/agent/cmd/unprivileged.go
	modified:   internal/pkg/agent/cmd/upgrade.go
	modified:   internal/pkg/agent/cmd/watch.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   internal/pkg/agent/cmd/diagnostics_otel.go
	both modified:   internal/pkg/agent/cmd/enroll.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)

[elasticmachine]

⏳ Build in-progress, with failures

• Buildkite Build
• Commit: e6e976f

Failed CI Steps

• check-ci
• Unit tests - Ubuntu 22.04
• Unit tests - Ubuntu 22.04
• Unit tests - Ubuntu 22.04 with requirefips build tag
• Unit tests - Ubuntu 22.04 with requirefips build tag
• Unit tests - fips140=only Ubuntu 22.04
• Unit tests - fips140=only Ubuntu 22.04
• Unit tests - Ubuntu 22.04 ARM64
• Unit tests - Ubuntu 22.04 ARM64
• Unit tests - Windows 2022
• Unit tests - Windows 2022
• Unit tests - Windows 2016
• Unit tests - Windows 2016
• Unit tests - macOS 15 ARM
• Unit tests - Windows 10
• Unit tests - Windows 10
• Unit tests - Windows 11
• Unit tests - Windows 11
• Packaging: linux/amd64 rpm
• Packaging: linux/amd64 rpm
• Packaging: Ubuntu x86_64 FIPS
• Packaging: Ubuntu x86_64 FIPS
• Packaging: linux/arm64 tar.gz
• Packaging: linux/arm64 tar.gz
• Packaging: Ubuntu arm64 FIPS
• Packaging: Ubuntu arm64 FIPS
• Packaging: windows/amd64 zip
• Packaging: windows/amd64 zip
• Packaging: Containers linux/amd64
• Packaging: Containers linux/arm64
• Packaging: Containers linux/amd64 FIPS
• Packaging: Containers linux/arm64 FIPS

History

cc @straistaru