Make `read_clock_khr` always available (#310) #554

Job	Run time
Test (windows-2022)	15m 20s
Test (ubuntu-24.04)	8m 10s
Android (ubuntu-24.04, aarch64-linux-android)	7m 42s
Test (macOS-latest)	10m 43s
Difftest (macOS-latest)	9m 41s
Difftest (ubuntu-24.04)	8m 57s
Difftest (windows-2022)	16m 16s
Compiletest (macOS-latest)	12m 6s
Compiletest (ubuntu-24.04)	7m 58s
Compiletest (windows-2022)	15m 14s
cargo-deny	1m 1s
Lint	6m 8s
test_success	4s
	1h 59m 20s

Provide feedback