Migrate plugins from ElasticApmInstrumentation to TracerAwareInstrumentation

[tobiasstadler]

What does this PR do?

Migrated plugins from ElasticApmInstrumentation to TracerAwareInstrumentation to be more in line with the rest of the plugins.

Checklist

• This is something else
  • I have updated CHANGELOG.asciidoc

[ghost]

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• Start Time: 2021-10-10T02:31:57.733+0000

• Duration: 60 min 14 sec

• Commit: 9c35ed8

Test stats 🧪

Test	Results
Failed	0
Passed	2417
Skipped	19
Total	2436

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Tests succeeded.

🤖 GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

• run benchmark tests : Run the benchmark test.

• run compatibility tests : Run the JDK Compatibility test.

• run integration tests : Run the APM-ITs.

[eyalkoren]

run elasticsearch-ci/docs

[ghost]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

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Build stats

• Start Time: 2021-10-10T08:02:21.966+0000

• Duration: 56 min 24 sec

• Commit: 1533b31

Test stats 🧪

Test	Results
Failed	0
Passed	2418
Skipped	19
Total	2437

💚 Flaky test report

Tests succeeded.

🤖 GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

• run benchmark tests : Run the benchmark test.

• run compatibility tests : Run the JDK Compatibility test.

• run integration tests : Run the APM-ITs.

[tobiasstadler]

Thank You!