ci: lint/go bodyclose in azureidentity_internal_test.go

CI Run Link: https://github.com/coder/coder/actions/runs/25791859937
Failed Job: https://github.com/coder/coder/actions/runs/25791859937/job/75759237891 (lint)

Commit Info:

• SHA: fb3aef1883eeb2bca266a267f474e8ddb062b406
• Author: Jakub Domeracki
• https://github.com/coder/coder/commit/fb3aef1883eeb2bca266a267f474e8ddb062b406

Error Evidence:

##[error]coderd/azureidentity/azureidentity_internal_test.go:67:31: response body must be closed (bodyclose)
    _, err := certFetchClient.Get(srv.URL)
                                 ^

Root Cause:
TestCertFetchClientRejectsLoopback calls certFetchClient.Get(srv.URL) without closing the response body, tripping the bodyclose linter in make lint.

Precise Assignment Analysis:

• git blame is not available via the API; used file history instead.
• git log --oneline -10 --follow coderd/azureidentity/azureidentity_internal_test.go -> fb3aef188 (Jakub Domeracki) most recent change.
  Assigning to jdomeracki-coder as the author of the latest changes to this test.

Classification:
E. Code Change (lint violation).

Related Issues Searched:

• "response body must be closed" + bodyclose
• "azureidentity_internal_test.go"
• "azureidentity" + lint

Reproduction:

• make lint (or golangci-lint run with bodyclose enabled)