Tweak tolerance and add check for intel/llvm in nightly

Author: ianayl

.github/workflows/sycl-nightly.yml

@@ -244,7 +244,7 @@ jobs:
       sycl_cts_artifact: sycl_cts_bin
 
   aggregate_benchmark_results:
-    if: always() && !cancelled()
+    if: github.repository == 'intel/llvm' && !cancelled()
     name: Aggregate benchmark results and produce historical averages
     uses: ./.github/workflows/sycl-benchmark-aggregate.yml
     secrets:

devops/benchmarking/config.ini

@@ -23,7 +23,7 @@ recorded = Median,StdDev
 ; the historical average. Metrics not included here are not compared against
 ; when passing/failing benchmark results.
 ; Format: comma-separated list of <metric>:<deviation percentage in decimals>
-tolerances = Median:0.05
+tolerances = Median:0.08
 
 ; Options for computing historical averages
 [average]