fix(apollo): Remove connect suffix from websocket connection url

[mattcreaser]

• PR title and description conform to Pull Request guidelines.

Issue #, if available: #3102

Description of changes:
The "connect" suffix was being applied to the actual websocket subscription connection URL, and not just in the IAM signature generation logic as intended. This could cause connection issues as in the linked issue. This change removes the "connect" suffix from the connection url and only applies it when calculating the signature for the request.

How did you test these changes?

• Verified subscriptions work as expected with IAM and other authorization modes.

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests
• Added Integration Tests
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Ensure commit message has the appropriate scope (e.g fix(storage): message, feat(auth): message, chore(all): message)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 54.22%. Comparing base (fa82953) to head (3651fac).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3114      +/-   ##
==========================================
- Coverage   54.23%   54.22%   -0.02%     
==========================================
  Files        1038     1038              
  Lines       31991    31989       -2     
  Branches     4702     4702              
==========================================
- Hits        17351    17346       -5     
- Misses      12794    12795       +1     
- Partials     1846     1848       +2     

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