otelmongo semconv 1.21.0 bump

[prestonvasquez]

Bump otelmongo semconv version to 1.21.0

[prestonvasquez]

@pellared @dmathieu PR to bump semconv to 1.24.0

[MrAlias]

Please address CI failures.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.7%. Comparing base (64d6d83) to head (4b30d5d).
Report is 7 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #6272   +/-   ##
=====================================
  Coverage   66.6%   66.7%           
=====================================
  Files        192     192           
  Lines      15525   15552   +27     
=====================================
+ Hits       10351   10378   +27     
  Misses      4883    4883           
  Partials     291     291           

Files with missing lines	Coverage Δ
....mongodb.org/mongo-driver/mongo/otelmongo/mongo.go	85.7% <ø> (ø)

... and 2 files with indirect coverage changes