Update elastic-agent-client to support diagnostics changes

[fearful-symmetry]

What does this PR do?

The final part of elastic/elastic-agent#2140 and elastic/elastic-agent#2141. This updates the elastic-agent-client dependency to bring in the changes now available in agent and the agent client.

Why is it important?

We want CPU profiling in diagnostics.

Checklist

• My code follows the style guidelines of this project
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.
• I have made my commit title and message explanatory about the purpose and the reason of the change

[elasticmachine]

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

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @fearful-symmetry? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v8./d.0 is the label to automatically backport to the 8./d branch. /d is the digit

[elasticmachine]

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• Start Time: 2023-07-28T20:12:13.915+0000

• Duration: 116 min 42 sec

Test stats 🧪

Test	Results
Failed	0
Passed	27593
Skipped	2008
Total	29601

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