docs: add release notes to docs

[bmorelli25]

Summary

• Adds release notes to the documentation

• Closes Integrate Release Notes into Elastic docs  #268.

Adds an end-of-life table to the documentation
* Closes #263.
Dates reflect Elastic's new EOL policy effective Oct 1, 2022.

[ghost]

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• Start Time: 2022-10-13T16:15:07.054+0000

• Duration: 9 min 32 sec

Test stats 🧪

Test	Results
Failed	0
Passed	164
Skipped	2
Total	166

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[bmorelli25]

@elasticmachine, run elasticsearch-ci/docs