Use upstream otel proto generated code

[brancz]

Otel now released a version of the generated code that includes the profiling definitions, this patch makes use of them.

[alwaysmeticulous]

✅ Meticulous spotted zero visual differences across 511 screens tested: view results.

_{Expected differences? Click here. Last updated for commit a8ebeb6. This comment will update as new commits are pushed.}