Problem

The generated-test "fetch module images" task downloads grpcurl from GitHub before fetching module images. The download command previously used --retry 5, but curl does not retry every transfer error by default. A peer reset produced curl (35) Recv failure: Connection reset by peer and caused the task to fail immediately.

Scope of Work

• Update src/mongo/db/modules/atlas/evergreen/fetch_images.sh with a portable Bash retry loop around the grpcurl download.
• Retry all curl failures, including connection resets, without requiring curl versions newer than the supported build images.
• Preserve failure behavior after five retries.

Acceptance Criteria

• Connection-reset/TLS download failures are retried automatically.
• The download still fails after six total attempts when the dependency is unavailable.
• The generated-test module image fetch task continues to complete successfully when the failure is transient.

Related Failure

The issue is related to BF-45091.