Remove reference to deprecated InstrumentationLibrary in OTLP

[ThomsonTan]

Fixes #1381

We upgraded OTLP proto files to 0.17.0, but we are still using InstrumentationLibrary in the OTLP message which was marked as deprecated, and this deprecated field is not compatible with previous OTLP message in wired format.

This PR replaces InstrumentationLibrary by InstrumentationScope in the OTLP exporter to fix the broken compatibility. Fix for the SDK is expected to be in future PR.

Changes

Please provide a brief description of the changes here.

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[codecov]

Codecov Report

Merging #1469 (adb7024) into main (b285874) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1469   +/-   ##
=======================================
  Coverage   85.30%   85.30%           
=======================================
  Files         154      154           
  Lines        4374     4374           
=======================================
  Hits         3731     3731           
  Misses        643      643           

[lalitb]

Thanks for the fix.