Disable protoquill

Protquill had to be disabled since it exhibited deeply nested errors in a function argument that went away
once an enclosing function was changed with a conversion or extension, and the full argument was completely typechecked.
Retype checking large bodies of code like this was never inteneded and counts as a bug in the compiler. Unfortunately,
this means that some type annotations will have to be added to protoquill to make it compiler again.

Author: odersky

community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala

@@ -75,7 +75,7 @@ class CommunityBuildTestC:
   // @Test def oslibWatch = projects.oslibWatch.run()
   @Test def playJson = projects.playJson.run()
   @Test def pprint = projects.pprint.run()
-  @Test def protoquill = projects.protoquill.run()
+  // @Test def protoquill = projects.protoquill.run()  // needs to fix new type inference errors
   @Test def requests = projects.requests.run()
   @Test def scalacheck = projects.scalacheck.run()
   @Test def scalaCollectionCompat = projects.scalaCollectionCompat.run()