Metal: track all resources

Bug: skia:12253
Change-Id: I6f5e0b520fd4cbf73a144080fd8b7e6390563bd4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/432878
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
9 files changed