[infra][iOS] Use OSX.15.Arm64.Open for arm64 iOS simulator and maccatalyst (#122286)

Author: matouskozak

eng/pipelines/coreclr/templates/helix-queues-setup.yml

@@ -34,7 +34,7 @@ jobs:
 
     # iOS Simulator/Mac Catalyst arm64
     - ${{ if in(parameters.platform, 'maccatalyst_arm64', 'iossimulator_arm64') }}:
-      - OSX.14.Arm64.Open
+      - OSX.15.Arm64.Open
 
     # iOS/tvOS Simulator x64 & MacCatalyst x64
     - ${{ if in(parameters.platform, 'iossimulator_x64', 'tvossimulator_x64', 'maccatalyst_x64') }}:

eng/pipelines/libraries/helix-queues-setup.yml

@@ -92,7 +92,7 @@ jobs:
 
     # iOS Simulator/Mac Catalyst arm64
     - ${{ if in(parameters.platform, 'maccatalyst_arm64', 'iossimulator_arm64') }}:
-      - OSX.14.Arm64.Open
+      - OSX.15.Arm64.Open
 
     # iOS/tvOS Simulator x64 & MacCatalyst x64
     - ${{ if in(parameters.platform, 'iossimulator_x64', 'tvossimulator_x64', 'maccatalyst_x64') }}: