pyramid: Only categorize 400s and 500s exceptions as errors

[nstawski]

Description

Pyramid instrumentation was categorizing all HTTPExceptions including 300s (redirects) and some 200s (for example, 204 No Content) as errors. This pull request updates this functionality to only categorize HTTPErrors as errors. List of exceptions in Pyramid

Fixes #1037

Type of change

Please delete options that are not relevant.

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

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Added tests to check that redirect and no content exceptions are not categorized as errors to pyramid-redirect-error-fix/instrumentation/opentelemetry-instrumentation-pyramid/tests/test_automatic.py

Does This PR Require a Core Repo Change?

• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added