feat(audit_trail): add new data source audit_trail_event

[estellesoulard]

#3427

• The cassette is quite large, I compressed it but it seems not to have been resized one bit 😿
• I had initially added some tests without any filters, but this led to a huge cassette with a lot of info (listing all events on a whole organization for the past hour). This is why I opted to always include a filter on the test project to limit this.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 134 lines in your changes missing coverage. Please review.
✅ Project coverage is 1.75%. Comparing base (e9e8231) to head (a8b738e).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
internal/services/audittrail/event_data_source.go	0.00%	114 Missing ⚠️
internal/services/audittrail/helpers.go	0.00%	11 Missing ⚠️
internal/meta/extractors.go	0.00%	8 Missing ⚠️
provider/sdkv2.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #3445      +/-   ##
=========================================
- Coverage    1.76%   1.75%   -0.01%     
=========================================
  Files         400     402       +2     
  Lines       43839   43973     +134     
=========================================
- Hits          774     772       -2     
- Misses      42978   43113     +135     
- Partials       87      88       +1     

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