Revert "vulkan: brute force hack around (suspected) ANV bugs"

This reverts commit f8f90f5d.

Why are we even working around suspected driver bugs? It's really not
our issue, and I can't have this limit our release process. If users of
libplacebo want to work around such bugs, they still can.
11 jobs for v1.21.0 in 3 minutes and 3 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #309655
debian aarch64
build-debian-aarch64

00:00:31

passed #309656
macos
build-macos

00:00:28

passed #309651
amd64 debian
build-ubuntu

00:00:31

passed #309652
amd64 debian
build-ubuntu-static

00:00:31

passed #309653
win32
build-win32

00:00:27

passed #309654
win64
build-win64

00:00:27

 
  Test
failed #309661
gpu
test-gpu

00:01:18

passed #309657
amd64 debian
test-ubuntu-asan

00:00:30

passed #309658
amd64 debian
test-ubuntu-msan

00:00:30

passed #309660
amd64 debian
test-ubuntu-scan

00:00:57

passed #309659
amd64 debian
test-ubuntu-ubsan

00:00:29

 
Name Stage Failure
failed
test-gpu Test

Ok: 6
Expected Fail: 0
Fail: 1
Unexpected Pass: 0
Skipped: 0
Timeout: 0

ERROR: Job failed: exit code 1