[CI][Benchmarks] Fix pushing results to new branch

[PatKamin]

There is a bug that results in Nightly Benchmarks to fail pushing new results to the new results branch on intel/llvm:

[sycl d0defc846] [GHA] Upload compute-benchmarks results from https://github.com/intel/llvm/actions/runs/19053464326
 2 files changed, 15321 insertions(+)
 create mode 100644 data.json
 create mode 100644 results/Baseline_BMG_L0v2_20251104_003023.json
remote: error: GH006: Protected branch update failed for refs/heads/sycl.        
remote: 
remote: - Changes must be made through a pull request.        
remote: 
remote: - You're not authorized to push to this branch. Visit https://docs.github.com/repositories/configuring-branches-and-merges-in-your-repository/managing-protected-branches/about-protected-branches for more information.  

This patch fixes the benchmarking workflow to properly push to the correct llvm-ci-perf-results branch.

[PatKamin]

A test run: https://github.com/intel/llvm/actions/runs/19062984825

[lukaszstolarczuk]

LGTM

[PatKamin]

@intel/dpcpp-devops-reviewers, please review. Here is the proper test run for these changes: https://github.com/intel/llvm/actions/runs/19062984825

[lukaszstolarczuk]

@sarnex, can you please take a look a this - we need it after merging #20333

[sarnex]

@lukaszstolarczuk Done, can I merge or is the Benchmark CI failure related to this PR?

[uditagarwal97]

This patch fixes the benchmarking workflow to properly push to the correct llvm-ci-perf-results branch

This doesn't make sense to me. Why are we still pushing to branch in intel/llvm-ci-perf-results? instead of pushing to sycl-benchmark-ci-results branch of intel/llvm