fix: Update GCS bucket name for staging

[ajay-sentry]

Purpose/Motivation

Closes Sentry error https://codecov.sentry.io/issues/6058399091/?environment=staging&project=5215654&query=is%3Aunresolved%20issue.priority%3A%5Bhigh%2C%20medium%5D&referrer=issue-stream&sort=date&statsPeriod=14d&stream_index=5 related to access denied issue on staging when trying to fetch test results

Notes to Reviewer

Anything to note to the team? Any tips on how to review, or where to start?

Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. In 2022 this entity acquired Codecov and as result Sentry is going to need some rights from me in order to utilize my contributions in this PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: utils/test_results.py

Function	Unhandled Issue
get_results	GraphQLError: module 'shared.celery_config' has no attribute 'cache_test_rollups_redis_task_name' ... Event Count: 29

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[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.03%. Comparing base (b71179e) to head (8e26db7).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
codecov/settings_staging.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #969      +/-   ##
==========================================
- Coverage   96.04%   96.03%   -0.01%     
==========================================
  Files         827      827              
  Lines       19068    19071       +3     
==========================================
+ Hits        18313    18315       +2     
- Misses        755      756       +1     

Flag	Coverage Δ
unit	92.27% <75.00%> (-0.01%)	⬇️
unit-latest-uploader	92.27% <75.00%> (-0.01%)	⬇️

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[codecov-notifications]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
codecov/settings_staging.py	0.00%	1 Missing ⚠️

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[github-actions]

✅ All tests successful. No failed tests were found.

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[suejung-sentry]

I think technically we have a bunch of different buckets (like a separate one for bundle analysis)?
Not sure the organizational scheme we've got going on there to offer an alternative name here, so approved it