Add pprofile aggregation temporality constants

[dmathieu]

This adds constants to more easily use the aggregation temporality enum in pprofile.

This behavior is very similar to how pmetrics handles those constants.
See https://pkg.go.dev/go.opentelemetry.io/collector/pdata/pmetric#pkg-constants

cc @rockdaboot

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.27%. Comparing base (ef5f34f) to head (b3dd393).
Report is 34 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #12253   +/-   ##
=======================================
  Coverage   91.27%   91.27%           
=======================================
  Files         466      467    +1     
  Lines       25586    25595    +9     
=======================================
+ Hits        23354    23363    +9     
  Misses       1816     1816           
  Partials      416      416           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[mx-psi]

This deviates from the protobuf, right? Is the intent to add it to the protobuf later?

[dmathieu]

Hmm how does this deviate from the protobuf? It's adding public definitions for protobuf enums that are otherwise private.

[mx-psi]

Ah, I was not aware this is part of protobuf. Maybe "deviate" is not the right word; what I meant is that this was not generated code as it is the case in the metrics constants and I didn't understand why. Seems like it's all good now :)

[mx-psi]

Will merge this on Friday if there are no further comments