FAPI: Enable importing of private OSSL keys. #533

Job	Run time
scanbuild	1m 33s
test-coverage	1m 27s
build-test (ubuntu-18.04, gcc)	1m 43s
test-mbedtls (ubuntu-20.04)	2m 47s
build-test (ubuntu-18.04, clang)	1m 36s
test-no-crypto-build	1m 20s
test-mbedtls (ubuntu-22.04-mbedtls-3.1)	2m 44s
build-test (ubuntu-20.04, gcc)	1m 26s
test-tcti-config	1m 39s
build-test (ubuntu-20.04, clang)	1m 27s
build-test (fedora-32, gcc)	1m 19s
coverity-test	0s
test-fuzz	1m 30s
build-test (fedora-32, clang)	1m 29s
build-test (opensuse-leap, gcc)	1m 32s
build-test (opensuse-leap, clang)	1m 41s
build-test (ubuntu-22.04, gcc)	1m 21s
build-test (ubuntu-22.04, clang)	1m 27s
build-test (alpine-3.15, gcc)	1m 24s
build-test (alpine-3.15, clang)	1m 24s
	30m 49s

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