docs: consistent naming

[bmorelli25]

Summary

Updates elastic.co and repository documentation to use the correct product name: Elastic APM AWS Lambda extension. Most of these changes use the new attribute added in elastic/docs#2471. You can view the attribute here.

• For Use consistent naming for the extension in the repository and across communications #209.
• Blocked by Add APM AWS Lambda extension attr docs#2471

[apmmachine]

❕ Build Aborted

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Build stats

• Start Time: 2022-07-07T21:22:12.277+0000

• Duration: 63 min 35 sec

Test stats 🧪

Test	Results
Failed	0
Passed	110
Skipped	2
Total	112

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[bmorelli25]

@elasticmachine, run elasticsearch-ci/docs

[bmorelli25]

Can't add @jlvoiseux as a reviewer for some reason so pinging here.

[bmorelli25]

💚 All backports created successfully

Status	Branch	Result
✅	8.3

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