This relands I4d4a88cfbb77d8b7508b787c7fec44073d3b11b0.

Fixes:
- uninstantiated ImageTestMetal error
- failed ImageTest.ANGLEExtensionAvailability on ARM mac.

Bug: angleproject:5763
Bug: angleproject:5814
Change-Id: I906fe52baefd6be3c6e00f594795bd527df01616
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2820178Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Le Hoang Quyen <le.hoang.q@gmail.com>