Summary:
Test `TestPgRegressModulesUnsafeTests` fails on jenkins because Spark test workers cannot find necessary test files.
This diff adds these necessary test files as part of the tar.gz containing all code and compilation output needed to run tests remotely.
Jira: DB-13898

Test Plan: Jenkins: test regex: .*TestPgRegressModulesUnsafeTests.*

Reviewers: mihnea, smishra, jason

Reviewed By: jason

Subscribers: yql

Differential Revision: https://phorge.dev.yugabyte.com/D39746