fix(otelgrpc): correctly assign grpc status code

[liufuyang]

closes #4480

I tried to write a test as well to capture the issue above, also made a fix in interceptor.go

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: liufuyang / name: Fuyang Liu (f902f4d, 72a4588, 0fecb46, cff17fa)
• ✅ login: pellared / name: Robert Pająk (1516270, 0bf1d59)
• ✅ login: MrAlias / name: Tyler Yahn (d6c8a0d)

[codecov]

Codecov Report

Merging #4481 (d6c8a0d) into main (3232d7e) will not change coverage.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main   #4481   +/-   ##
=====================================
  Coverage   80.8%   80.8%           
=====================================
  Files        150     150           
  Lines      10245   10245           
=====================================
  Hits        8284    8284           
  Misses      1823    1823           
  Partials     138     138           

Files	Coverage Δ
...ion/google.golang.org/grpc/otelgrpc/interceptor.go	86.2% <100.0%> (ø)

[liufuyang]

@dashpole Thanks for the fast review. I pushed in again to fix some formatting issues.

[liufuyang]

I think the failed test is related to #4416?

[pellared]

I think the failed test is related to #4416?

90% that you are correct.

I just left 2 minor comments that I would love to have addressed and one bigger for which I created a separate issue.

Thanks for your contribution 👍

[liufuyang]

Thanks, I fixed up the 2 minor comments as you suggested :)