feat: add event name to event API and SDK

[dyladan]

Leaving as a draft because when I went to test it I found the proto still needs to be updated. This is what I get for saying this would be "simple" yesterday.

Depends on #5643

Adds event name to the logger emit event API as required by spec.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.04%. Comparing base (55f8c20) to head (4af0086).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5707   +/-   ##
=======================================
  Coverage   95.03%   95.04%           
=======================================
  Files         310      310           
  Lines        7998     8008   +10     
  Branches     1615     1616    +1     
=======================================
+ Hits         7601     7611   +10     
  Misses        397      397           

Files with missing lines	Coverage Δ
...erimental/packages/api-logs/src/types/LogRecord.ts	100.00% <ø> (ø)
...ckages/otlp-transformer/src/logs/internal-types.ts	100.00% <ø> (ø)
...tal/packages/otlp-transformer/src/logs/internal.ts	100.00% <ø> (ø)
experimental/packages/sdk-logs/src/LogRecord.ts	98.27% <100.00%> (+0.16%)	⬆️

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[svetlanabrennan]

LGTM. Just needs an update on the PR title and description since it's not in draft mode anymore.

[pichlermarc]

looks good!