Fix red on tree for mix(x,y,bool) tests.

It appears that ANGLE ES3 on Metal fails to implement
`mix(scalar, scalar, bool)`; its implementation assumes that the
passed-in values will be vectors. Filed as b/268720489.

Additionally, this fixes a test disable that referred to the test
by its prior name, before it was given the ES2 suffix.

Bug: b/268720489
Change-Id: I114093cfc8da529ee2beb7689368e82b8f8f7a54
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/641701
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
2 files changed