chore (deps) : upgrade Go toolchain to 1.24.6

[rohanKanojia]

What does this PR do?

• Updated Go version from 1.23.6 to 1.24.6 in GitHub Actions workflows:

  • .github/workflows/code-coverage.yml
  • .github/workflows/pr.yml

• Updated go.mod toolchain directive from go 1.24.4 to go 1.24.6

• Updated base image versions in Dockerfiles to match Go 1.24.6:

  • build/Dockerfile
  • project-clone/Dockerfile

What issues does this PR fix or reference?

Is it tested? How?

I just verified make test is passing. Will keep it as draft until CI checks are not passed.

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 34.08%. Comparing base (8f2d764) to head (93ff29e).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1507      +/-   ##
==========================================
+ Coverage   34.05%   34.08%   +0.02%     
==========================================
  Files         160      160              
  Lines       13336    13348      +12     
==========================================
+ Hits         4542     4549       +7     
- Misses       8484     8489       +5     
  Partials      310      310              

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[rohanKanojia]

/ok-to-test

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dkwon17, rohanKanojia

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Needs approval from an approver in each of these files:

• OWNERS [dkwon17]

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[rohanKanojia]

/retest

[rohanKanojia]

/retest

[dkwon17]

@rohanKanojia thank you, LGTM, merging