Enable `<ClangTidyCheck/>` task during nightly build

[pjcollins]

Context: #6420

Enabling the <ClangTidyCheck/> analysis target on nightly builds (by adding it to this target dependency list) causes a build failure:

"/Users/builder/azdo/_work/3/s/xamarin-android/Xamarin.Android.sln" (default target) (1:2) ->
"/Users/builder/azdo/_work/3/s/xamarin-android/src/monodroid/monodroid.csproj" (default target) (20:6) ->
  /Users/builder/azdo/_work/3/s/xamarin-android/src/monodroid/monodroid.targets(289,5): error MSB3073: The command "/Users/builder/Library/Android/ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang-tidy -p /Users/builder/azdo/_work/3/s/xamarin-android/src/monodroid/obj/Release/x86-Debug *.cc > ../../../bin/BuildRelease/clang-tidy.x86-Debug.log" exited with code 1. [/Users/builder/azdo/_work/3/s/xamarin-android/src/monodroid/monodroid.csproj]

See the clang-tidy.* logs below for more info:
xa-build-status-12.1.99.49_3aaf482-Darwin-Release.zip

We should fix (or exclude) the errors reported by this check, and then re-enable it in our nightly builds.