Stresstest fix - Add limits to the graph mutation stress test

[r1viollet]

What does this PR do?:

Add limits to the number of nodes and links.

Motivation:

Ensure we don't go in OOM error in the stresstest.

Additional Notes:

How to test the change?:

For Datadog employees:

• If this PR touches code that signs or publishes builds or packages, or handles
  credentials of any kind, I've requested a review from @DataDog/security-design-and-guidance.
• This PR doesn't touch any of that.
• JIRA: [JIRA-XXXX]

Unsure? Have a question? Request a review!

[github-actions]

🔧 Report generated by pr-comment-cppcheck

CppCheck Report

Errors (2)

• There is an unknown macro here somewhere. Configuration is required. If LP64_ONLY is a macro then please configure it.
• syntax error

Warnings (4)

• The class 'RecordingBuffer' defines member function with name 'flushIfNeeded' also defined in its parent class 'Buffer'.
• Member variable 'JitWriteProtection::_restore' is not initialized in the constructor.
• Member variable 'JitWriteProtection::_restore' is not initialized in the constructor.
• Member variable 'ElfParser::_vaddr_diff' is not initialized in the constructor.

Style Violations (297)

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[github-actions]

🔧 Report generated by pr-comment-scanbuild

[jbachorik]

The increment operator is not atomic, unfortunately.
You can use AtomicInteger for the linkIndex instead.

[jbachorik]

Is this used/going to be used soon?

[r1viollet]

Thanks for the feedback,
I had changed the workload too much, I'm trying to iterate on something that is not too different from previous workload

[jbachorik]

Looks reasonable.
Just in case - did you check that the stresstest counters are somewhat comparable before and after this change?

[r1viollet]

This leads to comparable results