Add a separate provisioning script to install Xcode if it's not already installed on the bot.
For some unknown reason it needs to be a separate script, otherwise the provisionator will complain it doesn't know the required GitHub token to download Xcode.
Fixes https://github.com/xamarin/xamarin-macios/issues/6326.
* [tests] Add sample tester.
Add a unit project that looks for iOS/macOS/tvOS sample projects in several
repositories, and builds them all.
* [tests][sampletester] Remove known issue which has now been fixed.
* [tests] Only run sample tests on CI in Azure Devops.
* Remove the possibility of automatically running the sample tests with
xharness (so the sample tests won't run on PR bots or internal bots when the
'run-all-tests' label is added). It's still possible to run the sample tests
manually from the xharness web UI.
* Automatically trigger the sample test run in Azure Devops if the
'run-sample-tests' label is applied to a PR (and that PR is executed on
internal Jenkins).
* Fix typo.
* Fix path.
* Verbose output to track down scheduling failure.
* Bump maccore to get improved debug spew.
Diff: f527c9c526..f89d74b165
* [tests][sampletester] Fix build for TodoWCF.
Rolf Bjarne Kvinge
Alexander Köplinger
Alex Soto