[infra] Run all migrated co19 tests on nnbd configurations

co19 test migration has started, and these tests will be unskipped
folder by folder now.

Change-Id: I7dad1a97d1a676042512a8a19e1403849e039f97
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149002
Reviewed-by: William Hesse <whesse@google.com>

https://dart.googlesource.com/sdk/+/42c3d2175655193d225d7b67a7355f0c1ae1d9c3
1 file changed
tree: e1ae040e4b5c744717c236ef87828f0d5624290a
  1. commits.json