Filter out umf benchmark

[PatKamin]

In Nightly runs, and in on-demand benchmarks, there are failures in gromacs benchmarks setup. Add a filter to run only umf benchmarks as it was before introducing gromacs benches in intel/llvm.

Description

Checklist

• Code compiles without errors locally
• All tests pass locally
• CI workflows execute properly

• CI workflows, not executed per PR (e.g. Nightly), execute properly
• New tests added, especially if they will fail without my changes
• Added/extended example(s) to cover this functionality
• Extended the README/documentation
• All newly added source files have a license
• All newly added source files are referenced in CMake files
• Logger (with debug/info/... messages) is used
• All API changes are reflected in docs and def/map files, and are tested

[PatKamin]

CI looks ok:
Compute Benchmarks: https://github.com/oneapi-src/unified-memory-framework/actions/runs/16045383292/job/45275362301
Nightly: https://github.com/oneapi-src/unified-memory-framework/actions/runs/16045383305
Failure in Benchmarks-sycl is unrelated to these changes, see: https://github.com/oneapi-src/unified-memory-framework/actions/runs/16041335185/job/45263371374