Remove domain from the Events API

[martinkuba]

Which problem is this PR solving?

event domain was removed from the specification in this PR open-telemetry/opentelemetry-specification#3749.

Fixes # open-telemetry/opentelemetry-specification#2994

Short description of the changes

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

[codecov]

Codecov Report

Merging #4569 (3a47029) into main (5fb65b4) will increase coverage by 0.01%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4569      +/-   ##
==========================================
+ Coverage   92.84%   92.85%   +0.01%     
==========================================
  Files         328      328              
  Lines        9494     9494              
  Branches     2040     2040              
==========================================
+ Hits         8815     8816       +1     
+ Misses        679      678       -1     

Files	Coverage Δ
...ackages/api-events/src/NoopEventEmitterProvider.ts	100.00% <ø> (ø)
experimental/packages/api-events/src/api/events.ts	100.00% <ø> (ø)

... and 1 file with indirect coverage changes