fix(codspeed): always compile instrument-hooks (with stubs) #809

Job	Run time
test-codspeed (windows-latest)	1m 26s
test-codspeed (ubuntu-latest)	57s
lint	1m 13s
msrv-check	1m 1s
test-codspeed (macos-latest)	54s
compat-integration-test-instrumentation (-p codspeed-divan-compat-examples)	8m 16s
compat-integration-test-instrumentation (-p codspeed-bencher-compat)	1m 26s
musl-build-check (x86_64-unknown-linux-musl, ubuntu-24.04)	3m 32s
compat-integration-test-instrumentation (-p codspeed)	2m 30s
compat-integration-test-walltime (codspeed-divan-compat)	4m 25s
tests	20m 4s
compat-integration-test-instrumentation (--features async_futures -p codspeed-criterion-compat)	2m 53s
musl-build-check (aarch64-unknown-linux-musl, codspeedhq-arm64-ubuntu-24.04)	3m 45s
compat-integration-test-walltime (codspeed-divan-compat-examples)	7m 15s
compat-integration-test-instrumentation (-p codspeed-divan-compat)	3m 33s
compat-integration-test-walltime (codspeed-criterion-compat)	13m 19s
check	2s
	1h 16m 31s

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