DEBUG-2334 dynamic instrumentation probe manager + instrumentation integration tests

[p-datadog]

What does this PR do?

• Adds a probe manager class whose function is to maintain the list of probes received from remote config and their state (pending/instrumented/failed).
• Probe manager drives Instrumenter (already in master) to perform instrumentation.
• Probe manager keeps track of when instrumentation fails for reasons other than the target is not yet loaded, adds such probes to the list of failed probes and does not attempt to instrument them again.
• Integration tests for instrumentation of the supported cases (method/line probes, basic/enriched, target is loaded/is loaded later) are included and comprise majority of the diff
• DI Component is also part of this PR, it is needed to link Code Tracker and globally installed trace points for code loading and class definition to Probe Manager to install the pending probes

Motivation:

Initial DI implementation

Change log entry
None

Additional Notes:

This PR is extracted from #4063. It still does not enable DI for customers.

This PR is on top of #4088 and #4089, those PRs need to be merged first and then I will rebase this PR on master.

sig files are all stubs, I can edit them after all of the DI is in master but doing so currently causes churn that is not helping release DI on time.

How to test the change?
Unit and integration tests included.

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-11-12 16:49:05

Comparing candidate commit 2386443 in PR branch di-instrumentation with baseline commit e28cb05 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 29 metrics, 2 unstable metrics.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.28152% with 39 lines in your changes missing coverage. Please review.

Project coverage is 97.77%. Comparing base (54a779e) to head (2386443).
Report is 20 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/datadog/di/probe_manager.rb	79.59%	20 Missing ⚠️
lib/datadog/di/component.rb	85.71%	8 Missing ⚠️
...pec/datadog/di/integration/instrumentation_spec.rb	98.20%	5 Missing ⚠️
spec/datadog/di/probe_manager_spec.rb	98.13%	3 Missing ⚠️
lib/datadog/di.rb	83.33%	2 Missing ⚠️
lib/datadog/di/code_tracker.rb	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4097      +/-   ##
==========================================
+ Coverage   97.74%   97.77%   +0.02%     
==========================================
  Files        1341     1350       +9     
  Lines       80356    81052     +696     
  Branches     4030     4081      +51     
==========================================
+ Hits        78541    79245     +704     
+ Misses       1815     1807       -8     

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