Introduce set_custom_verify_callback and set_async_custom_verify_call… #658

Job	Run time
Test FIPS integration	3m 11s
Cross build from macOS to Linux (x86_64-unknown-linux-gnu)	4m 51s
clippy	1m 10s
Test (stable)	2m 7s
Cross build from macOS to Linux (FIPS) (x86_64-unknown-linux-gnu)	6m 28s
Test (arm-android)	2m 6s
rustfmt	10s
Test features	3m 1s
Test (arm64-android)	1m 56s
Test (i686-android)	2m 1s
Test (x86_64-android)	2m 1s
Test (aarch64-ios)	6m 12s
Test (aarch64-ios-sim)	4m 49s
Test (x86_64-ios)	6m 25s
Test (i686-linux)	2m 24s
Test (arm-linux)	2m 45s
Test (aarch64-linux)	2m 22s
Test (arm64-macos)	5m 44s
Test (x86_64-macos)	6m 16s
Test (x86_64-mingw)	7m 55s
Test (i686-msvc)	7m 11s
Test (x86_64-msvc)	7m 21s
	1h 28m 26s

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