release-24.3: roachtest: link on large pool - #157934

✅ PR #157934 is compliant with backport policy

Confidence: high
Backward compatible: true
Explanation: The PR is for a change in the non-production file path 'pkg/cmd/roachtest/BUILD.bazel', which is categorized under development tools. According to the policy criteria, changes that only affect non-production code, such as tests or development tools, are exempt from the standard backport requirements. The change in question adds an 'exec_properties' attribute to modify execution pool settings in a build configuration file and does not affect production code. The PR also includes a 'Release justification: Non-production code changes' indicating it has been reviewed for compliance.