Increase libraries run timeouts from default 150 to 300 minutes. (#114722)

osx-arm64 queues have been timing out due to too many jobs sent to too
few machines, by the superpmi-collect pipeline.

Author: BruceForstall

eng/pipelines/coreclr/templates/superpmi-collect-pipeline.yml

@@ -326,6 +326,8 @@ extends:
             unifiedArtifactsName: BuildArtifacts_$(osGroup)$(osSubgroup)_$(archType)_Checked
             helixArtifactsName: LibrariesTestArtifacts_$(osGroup)$(osSubgroup)_$(archType)_Checked
             unifiedBuildConfigOverride: checked
+            # Default timeout is 150 minutes, which is too low for osx-arm64 queue.
+            timeoutInMinutes: 300
 
       #
       # Collection of libraries test run: no_tiered_compilation
@@ -357,3 +359,5 @@ extends:
             unifiedArtifactsName: BuildArtifacts_$(osGroup)$(osSubgroup)_$(archType)_Checked
             helixArtifactsName: LibrariesTestArtifacts_$(osGroup)$(osSubgroup)_$(archType)_Checked
             unifiedBuildConfigOverride: checked
+            # Default timeout is 150 minutes, which is too low for osx-arm64 queue.
+            timeoutInMinutes: 300