Allow external bindgen; more prefixing; bump aws-lc-sys to v0.15.1 #356

Job	Run time
apidiff (aws-lc-sys, branch)	2m 11s
bindgen-dependency (ubuntu-latest)	19s
apidiff (aws-lc-sys, published)	2m 35s
bindgen-dependency (macos-12)	33s
apidiff (aws-lc-fips-sys, branch)	2m 25s
bindgen-dependency (macos-13-xlarge)	23s
apidiff (aws-lc-fips-sys, published)	2m 47s
apidiff (aws-lc-rs, branch)	2m 14s
bindgen-dependency (windows-latest)	37s
apidiff (aws-lc-rs, published)	2m 33s
bindgen-fips-dependency (ubuntu-latest)	15s
clippy (aws-lc-rs, --features bindgen,unstable)	1m 2s
clippy (aws-lc-rs, --features bindgen,unstable,fips)	1m 20s
bindgen-fips-dependency (macos-12)	40s
bindgen-fips-dependency (macos-13-xlarge)	22s
clippy (aws-lc-rs, --no-default-features --features aws-lc-sys)	44s
copyright	4s
bindgen-fips-dependency (windows-latest)	38s
dependency-review	16s
Resolve the dependencies to the minimum SemVer version	37s
mirai-analysis	3m 12s
rustfmt	26s
semver-checks	3m 42s
udeps	7m 40s
	37m 35s

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