Pin codecov uploader version to 0.6.0 (#2385)

Summary:
Changes have made upload from forked repos fail, see codecov/codecov-cli#460 (comment) for details. Pinning for now until resolved.

Pull Request resolved: #2385

Reviewed By: dme65

Differential Revision: D58875053

Pulled By: Balandat

fbshipit-source-id: e3c1b3363f2a7bfd22c947ceab65bb60abdf162b

Author: Balandat

.github/workflows/reusable_test_pip.yml

@@ -52,4 +52,5 @@ jobs:
       with:
         fail_ci_if_error: true
         token: ${{ secrets.CODECOV_TOKEN }}
+        version: v0.6.0  # TODO: Unpin after codecov issue with 0.7.0 is resolved: https://github.com/codecov/codecov-cli/issues/460#issuecomment-2183042570
         files: ./botorch_cov.xml,./botorch_community_cov.xml