Replacing memory limiter processor with extension

[michalpristas]

Replaces processor with extensions in order to avoid dropping events when processor hits the limits. Extension puts back-pressure on receivers

Fixes: #4665

[elasticmachine]

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

[elasticmachine]

Pinging @elastic/elastic-agent (Team:Elastic-Agent)

[ycombinator]

Move these into the OTel Collector dependencies require group?

[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 otel/memorylimiterextension upstream/otel/memorylimiterextension
git merge upstream/main
git push upstream otel/memorylimiterextension

[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 otel/memorylimiterextension upstream/otel/memorylimiterextension
git merge upstream/main
git push upstream otel/memorylimiterextension

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

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

See analysis details on SonarQube