Chunk Ctests so we dont run into large number of tests error

[vidyasagar-amd]

Proposed changes

Making our launch script more robust so that we dont encounter this error:
[2025-10-16T23:37:09.714Z] ../script/launch_tests.sh: line 59: /usr/bin/ctest: Argument list too long`

Checklist

Please put an x into the boxes that apply. You can also fill these out after creating the PR. If you're not sure, please don't hesitate to ask.

• I have added tests relevant to the introduced functionality, and the unit tests are passing locally
• I have added the test to REGRESSION_TESTS list defined at the top of CMakeLists.txt in tests/CMakeLists.txt, IF the test takes more than 30 seconds to run.
• I have added inline documentation which enables the maintainers with understanding the motivation
• I have removed the stale documentation which is no longer relevant after this pull request
• (If this change is user-facing) I have added release notes which provide the end users with a brief summary of the improvement from this pull request
• I have run clang-format on all changed files
• Any dependent changes have been merged

Discussion

If this is a relatively large or complex change, feel free to start a discussion by explaining why you chose the solution you did and what alternatives you considered

[Copilot]

Pull Request Overview

This PR refactors the test launch script to run tests in configurable chunks rather than as a single ctest command. The changes enable better control over test execution with support for chunked execution and fail-fast behavior.

Key changes:

• Replaces the single ctest command generation with a Python script that executes tests in chunks
• Adds configurable chunk size and fail-fast mode via environment variables
• Implements test execution tracking with detailed summary reporting

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