Use arcade script for installing MacOS dependencies (#7533)

Author: ericstj

build/ci/job-template.yml

@@ -68,7 +68,7 @@ jobs:
     # Extra MacOS step required to install OS-specific dependencies
     - ${{ if contains(parameters.pool.vmImage, 'macOS')  }}:
       - script: |
-          brew update
+          $(Build.SourcesDirectory)/eng/common/native/install-dependencies.sh osx
           brew install libomp
           brew link libomp --force
         displayName: Install MacOS build dependencies

build/vsts-ci.yml

@@ -145,7 +145,7 @@ extends:
             ArtifactName: pkgassets
         steps:
         - script: |
-            brew update
+            $(Build.SourcesDirectory)/eng/common/native/install-dependencies.sh osx
             brew install libomp
             brew link libomp --force
           displayName: Install build dependencies
@@ -167,7 +167,7 @@ extends:
             ArtifactName: pkgassets
         steps:
         - script:  |
-            brew update
+            $(Build.SourcesDirectory)/eng/common/native/install-dependencies.sh osx
             brew install libomp
             brew link libomp --force
           displayName: Install build dependencies