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Draft: Improve FVP-based test runs by enabling parallel execution

Anton Bondarenko requested to merge anton/fvp_improve into main

FVP is useful for exercising CPU features when dedicated hardware is unavailable, but it is slow and can significantly increase CI wall-clock time. To mitigate this, run FVP-backed tests in parallel and add support tooling:

  • parallelize test execution and shard workloads in .gitlab-ci.yml
  • add parallel.py to orchestrate test sharding and round-robin/bin/time-balanced strategies
  • add fvp.sh wrapper to simplify running binaries inside the FVP environment
  • fetch and reuse previous artifacts to avoid re-running already-completed work
  • reduce long job timeouts and enable job-level parallelism where appropriate

This reduces overall CI latency while preserving deterministic coverage of SME/SVE/other feature paths.

Split huge test suites into smaller for better balancing.

Signed-off-by: Anton Bondarenko anton.bondarenko@arm.com

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