Add workaround for CocoaPods 1.15.0 issues (#3427)

* Add workaround for Cocoapods 1.15.0 issues

* Actually call the "install CocoaPods 1.15.2" job

* Limit CocoaPods installation to Apple platforms

---------

Co-authored-by: Adam Gleitman <adgleitm@microsoft.com>

.ado/azure-pipelines.yml

@@ -79,6 +79,8 @@ jobs:
 
       - template: templates/setup-repo-min-build.yml
 
+      - template: templates/apple-ensure-valid-cocoapods.yml
+
       - script: |
           yarn bundle:macos
         workingDirectory: apps/fluent-tester
@@ -122,6 +124,8 @@ jobs:
 
       - template: templates/setup-repo-min-build.yml
 
+      - template: templates/apple-ensure-valid-cocoapods.yml
+
       - script: |
           yarn bundle:ios
         workingDirectory: apps/fluent-tester

.ado/templates/apple-ensure-valid-cocoapods.yml

@@ -0,0 +1,10 @@
+# Cocoapods 1.15.0 doesn't work with React Native
+steps:
+  - task: CmdLine@2
+    displayName: Install Cocoapods 1.15.2 if needed
+    inputs:
+      script: |
+        POD_VERSION=$(pod --version)
+        if [ $POD_VERSION = 1.15.0 ]; then
+          gem install cocoapods -v 1.15.2
+        fi