[1.16](backport #454) Updating bucket references from O11y to Ingest path

[mergify]

Updating bucket references from obs-ci-cache to ingest-buildkite-ci

Closes: https://github.com/elastic/ingest-dev/issues/3751

---

This is an automatic backport of pull request #454 done by Mergify.

[mergify]

Cherry-pick of 206cfe2 has failed:

On branch mergify/bp/1.16/pr-454
Your branch is up to date with 'origin/1.16'.

You are currently cherry-picking commit 206cfe2.
  (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:
	modified:   go/base-arm/Dockerfile.tmpl
	modified:   go/base/Dockerfile.tmpl

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   Makefile.common
	both modified:   README.md
	both modified:   go/Makefile.common
	both modified:   go/darwin/Dockerfile.tmpl
	deleted by us:   go/llvm-apple/Dockerfile.tmpl
	both modified:   go/main/Dockerfile.tmpl

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]

💔 Build Failed

• Buildkite Build
• Commit: a6a4c67

Failed CI Steps

• :pipeline:⬆️ Upload Pipeline: .buildkite/llvm-apple-pipeline.yml

cc @rowlandgeoff

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: a6a4c67

Failed CI Steps

• :pipeline:⬆️ Upload Pipeline: .buildkite/pipeline.yml

cc @rowlandgeoff

[elasticmachine]

⏳ Build in-progress, with failures

• Buildkite Build
• Commit: a6a4c67

Failed CI Steps

• :pipeline:⬆️ Upload Pipeline: .buildkite/fpm-pipeline.yml

cc @rowlandgeoff

[v1v]

unrequired... there are some changes that have not been backported... so let's keep it simple and forget about this branch