Update tests which mix int and float types without casts.

These need to change because type coercion in SkSL is about to become
more strict in a followup CL; we are disallowing expressions that mix
ints and floats without a cast.

Change-Id: I0f6c3cba53fb67078f447345338262c153236c51
Bug: skia:11164
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/353102
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
39 files changed