Previously the code would truncate 64-bit data to fit in 32-bits.
This ran into a serialization bug when expanding a 64-bit mask.
The new blend state masks for extended range were out of range for
the 32-bit promotion that was happening before.

Also refactors how we capture bools and enums to be more consistent.

size_t is now correctly saved and loaded as 64-bits.

Bug: angleproject:5247
Change-Id: I452a98c1b0add4c0cf45493032e9310e7d8321b2
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2497561Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>