ref(flags): rename launch darkly hook to match JS SDK

[aliu39]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.37%. Comparing base (24e5359) to head (d9ead3d).
Report is 14 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3743      +/-   ##
==========================================
- Coverage   84.37%   84.37%   -0.01%     
==========================================
  Files         136      136              
  Lines       14370    14370              
  Branches     2417     2417              
==========================================
- Hits        12125    12124       -1     
  Misses       1495     1495              
- Partials      750      751       +1     

Files with missing lines	Coverage Δ
sentry_sdk/integrations/launchdarkly.py	91.17% <100.00%> (ø)

... and 1 file with indirect coverage changes

[antonpirker]

@cmanallen is this fine with you?

[antonpirker]

And @aliu39 is this ready for review, because it is a draft?