Adding support for latest version to attcher cli

[eyalkoren]

What does this PR do?

Closes #2614

Checklist

• I have updated CHANGELOG.asciidoc
• I have added tests that prove my fix is effective or that my feature works
• Added an API method or config option? Document in which version this will be introduced
• I have made corresponding changes to the documentation
• I have tested manually end-to-end

[felixbarny]

LGTM, but I recommend adding another unit test for the HTML parsing.

[ghost]

💚 Build Succeeded

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

Expand to view the summary

Build stats

• Start Time: 2022-06-06T05:13:59.102+0000

• Duration: 52 min 43 sec

Test stats 🧪

Test	Results
Failed	0
Passed	2935
Skipped	22
Total	2957

💚 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 tests.

• run jdk compatibility tests : Run the JDK Compatibility tests.

• run integration tests : Run the Agent Integration tests.

• run end-to-end tests : Run the APM-ITs.

• run windows tests : Build & tests on windows.

• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)