Disable package caching

Cache restoration is not fast enough.

.azure-devops-android-tests.yml

@@ -15,6 +15,7 @@ jobs:
     clean: true
 
   - task: CacheBeta@0
+    condition: eq(variables['enable_package_cache'], 'true')
     inputs:
       key: nuget | $(Agent.OS) | $(Agent.JobName) | $(build.sourcesdirectory)/**/*.csproj | $(build.sourcesdirectory)/**/Directory.Build.targets | $(build.sourcesdirectory)/**/Directory.Build.props
       path: $(NUGET_PACKAGES)

.azure-devops-docs.yml

@@ -17,6 +17,7 @@ jobs:
     clean: true
 
   - task: CacheBeta@0
+    condition: eq(variables['enable_package_cache'], 'true')
     inputs:
       key: nuget | $(Agent.OS) | $(Agent.JobName) | $(build.sourcesdirectory)/**/*.csproj | $(build.sourcesdirectory)/**/Directory.Build.targets | $(build.sourcesdirectory)/**/Directory.Build.props
       path: $(NUGET_PACKAGES)

.azure-devops-ios-tests.yml

@@ -15,6 +15,7 @@ jobs:
     clean: true
 
   - task: CacheBeta@0
+    condition: eq(variables['enable_package_cache'], 'true')
     inputs:
       key: nuget | $(Agent.OS) | $(Agent.JobName) | $(build.sourcesdirectory)/**/*.csproj | $(build.sourcesdirectory)/**/Directory.Build.targets | $(build.sourcesdirectory)/**/Directory.Build.props
       path: $(NUGET_PACKAGES)

.azure-devops-macos.yml

@@ -16,6 +16,7 @@ jobs:
     clean: true
 
   - task: CacheBeta@0
+    condition: eq(variables['enable_package_cache'], 'true')
     inputs:
       key: nuget | $(Agent.OS) | $(Agent.JobName) | $(build.sourcesdirectory)/**/*.csproj | $(build.sourcesdirectory)/**/Directory.Build.targets | $(build.sourcesdirectory)/**/Directory.Build.props
       path: $(NUGET_PACKAGES)

.azure-devops-wasm-uitests.yml

@@ -16,6 +16,7 @@ jobs:
     clean: true
 
   - task: CacheBeta@0
+    condition: eq(variables['enable_package_cache'], 'true')
     inputs:
       key: nuget | $(Agent.OS) | $(Agent.JobName) | $(build.sourcesdirectory)/**/*.csproj | $(build.sourcesdirectory)/**/Directory.Build.targets | $(build.sourcesdirectory)/**/Directory.Build.props
       path: $(NUGET_PACKAGES)

.azure-devops-windows.yml

@@ -19,6 +19,7 @@ jobs:
     clean: true
 
   - task: CacheBeta@0
+    condition: eq(variables['enable_package_cache'], 'true')
     inputs:
       key: 'nuget | $(Agent.OS) | $(Agent.JobName) | $(build.sourcesdirectory)/**/*.csproj, !$(build.sourcesdirectory)/**/obj/Release, !$(build.sourcesdirectory)/**/Uno.UI.Tasks.csproj, !$(build.sourcesdirectory)/**/UnoQuickStart.*.csproj, !$(build.sourcesdirectory)/**/UnoLibraryTemplate/CrossTargetedLibrary.csproj | $(build.sourcesdirectory)/**/Directory.Build.targets | $(build.sourcesdirectory)/**/Directory.Build.props'
       path: $(NUGET_PACKAGES)