Disable Mono tests by default (release-6.10.x) (#6765)

Author: jeffkl

eng/pipelines/ci.yml

@@ -41,7 +41,7 @@ parameters:
 - name: RunMonoTestsOnMac
   displayName: Run Mono tests on Mac
   type: boolean
-  default: true
+  default: false
 
 resources:
   pipelines:

eng/pipelines/official.yml

@@ -26,7 +26,7 @@ parameters:
 - name: RunMonoTestsOnMac
   displayName: Run Mono tests on Mac
   type: boolean
-  default: true
+  default: false
 - name: SigningType
   displayName: Type of signing to use
   type: string

eng/pipelines/pull_request.yml

@@ -33,7 +33,7 @@ parameters:
 - name: RunMonoTestsOnMac
   displayName: Run Mono tests on Mac
   type: boolean
-  default: true
+  default: false
 - name: RunStaticAnalysis
   displayName: Run static analysis
   type: boolean