chore(ci): ignore caching related errors (#4663)

This should reduce failed builds and will slow down build on cache errors.

.azure/steps.yml

@@ -30,6 +30,7 @@ steps:
       key: yarn_cache | $(Agent.OS) | $(Build.SourcesDirectory)/yarn.lock
       path: $(YARN_CACHE_FOLDER)
     displayName: Cache Yarn packages
+    continueOnError: true
 
   # does not work on linux or mac :-(
   - task: CacheBeta@0
@@ -38,6 +39,7 @@ steps:
       path: $(Build.SourcesDirectory)/node_modules
     displayName: Cache node_modules
     condition: eq(variables['Agent.OS'], 'Windows_NT')
+    continueOnError: true
 
   - bash: |
       yarn install --frozen-lockfile --link-duplicates