fix(otlp-transformer): remove type dependency on Long

[legendecas]

Which problem is this PR solving?

Fixes #3020

Short description of the changes

We have no usage on types of Long and its implementation. Removing the references in types should not break any usage.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Followed the style guidelines of this project

[codecov]

Codecov Report

Merging #3022 (1676f77) into main (9c9789a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #3022   +/-   ##
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  Coverage   92.78%   92.78%           
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  Files         185      185           
  Lines        6144     6144           
  Branches     1300     1300           
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  Hits         5701     5701           
  Misses        443      443           

[dyladan]

Long was included here on purpose. When provided with a Long, the protobuf encoder uses it to ensure large numbers are accurate. It is not included by default because of its large payload penalty on browsers.

[legendecas]

@dyladan do we have a usage example on this? I didn't find one so it seems like safe to be removed.