feat(ourlogs): canonicalize paths from the logger integration

[colin-sentry]

We'd like to allow linking to the 'source code' line in the logs page - this canonicalizes the path relative to the project root (if one is defined)

Solves LOGS-58

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.29%. Comparing base (7f01372) to head (81797d1).
Report is 1 commits behind head on master.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
sentry_sdk/integrations/logging.py	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4336      +/-   ##
==========================================
- Coverage   80.29%   80.29%   -0.01%     
==========================================
  Files         142      142              
  Lines       15934    15937       +3     
  Branches     2726     2727       +1     
==========================================
+ Hits        12794    12796       +2     
- Misses       2263     2267       +4     
+ Partials      877      874       -3     

Files with missing lines	Coverage Δ
sentry_sdk/integrations/logging.py	82.80% <50.00%> (-0.32%)	⬇️

... and 4 files with indirect coverage changes

[sentrivana]

LGTM but please address comment before merging @colin-sentry. A test case would also be awesome

[sentrivana]

project_root might be None so we need to be more careful here:

Suggested change

	if record.pathname.startswith(project_root):
	if project_root is not None and record.pathname.startswith(project_root):

[colin-sentry]

done, test added too