Fix NOT_GIVEN check in anthropic

[sl0thentr0py]

same as #4926

Issues

• resolves: Exceptions on Anthropic and OpenAI integrations in the latest version #5057
• resolves: PY-1959

[linear]

PY-1959 Exceptions on Anthropic and OpenAI integrations in the latest version

[codecov]

Codecov Report

❌ Patch coverage is 64.28571% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.91%. Comparing base (f2e14a6) to head (093e040).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
sentry_sdk/integrations/anthropic.py	64.28%	2 Missing and 3 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5058   +/-   ##
=======================================
  Coverage   83.91%   83.91%           
=======================================
  Files         179      179           
  Lines       17894    17904   +10     
  Branches     3177     3179    +2     
=======================================
+ Hits        15015    15024    +9     
- Misses       1908     1909    +1     
  Partials      971      971           

Files with missing lines	Coverage Δ
sentry_sdk/integrations/anthropic.py	82.27% <64.28%> (-1.07%)	⬇️

... and 1 file with indirect coverage changes