[9.0] (backport #8372) otel: add cumulativetodeltaprocessor to EDOT collector

[mergify]

What does this PR do?

Adds cumulativetodeltaprocessor to the EDOT collector

elastic-agent version of elastic/opentelemetry-collector-components#601

/cc @codefromthecrypt

Why is it important?

Elastic stack only supports delta metrics. The processor can be used to still ingest certain cumulative metrics such as those scraped from Prometheus endpoints.

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

Disruptive User Impact

How to test this PR locally

Can start a server exposing Prometheus metrics such as envoy and configure collector with prometheus receiver and cumulativetodelta processor to elastic apm.

---

This is an automatic backport of pull request #8372 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 5111970 has failed:

On branch mergify/bp/9.0/pr-8372
Your branch is up to date with 'origin/9.0'.

You are currently cherry-picking commit 511197098.
  (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:   NOTICE.txt
	new file:   changelog/fragments/1749176965-add-cumulativetodeltaprocessor.yaml
	modified:   internal/pkg/otel/components.go
	modified:   internal/pkg/otel/testdata/all-components.yml

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   NOTICE-fips.txt
	both modified:   go.mod
	both modified:   go.sum
	both modified:   internal/pkg/otel/README.md
	deleted by us:   internal/pkg/otel/testdata/all-components-fips.yml

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)

[mergify]

This pull request has not been merged yet. Could you please review and merge it @anuraaga? 🙏

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: b0e47ff

Failed CI Steps

• Serverless integration test

History

• 💔 Build #22011 failed be0d77a
• 💔 Build #21997 failed 1aeea07

cc @anuraaga