feat: Use mirror to fix rate limit issue

[astuyve]

What does this PR do?

Build and integration tests occasionally fail with rate limit errors, because I used the wrong URL:

Motivation

Testing Guidelines

Additional Notes

Types of Changes

• Bug fix
• New feature
• Breaking change
• Misc (docs, refactoring, dependency upgrade, etc.)

Check all that apply

• This PR's description is comprehensive
• This PR contains breaking changes that are documented in the description
• This PR introduces new APIs or parameters that are documented and unlikely to change in the foreseeable future
• This PR impacts documentation, and it has been updated (or a ticket has been logged)
• This PR's changes are covered by the automated tests
• This PR collects user input/sensitive content into Datadog
• This PR passes the integration tests (ask a Datadog member to run the tests)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.10%. Comparing base (f06e18b) to head (3190714).

❗ Current head 3190714 differs from pull request most recent head 4a85c3a. Consider uploading reports for the commit 4a85c3a to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #497   +/-   ##
=======================================
  Coverage   82.10%   82.10%           
=======================================
  Files          54       54           
  Lines        2191     2191           
  Branches      511      511           
=======================================
  Hits         1799     1799           
  Misses        329      329           
  Partials       63       63           

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