FAPI: Fix unnecessary writes to keystore. #744

Job	Run time
test-coverage	5m 25s
scanbuild	6m 44s
build-test (ubuntu-20.04, gcc)	4m 27s
test-fuzz	2m 33s
build-test (ubuntu-20.04, clang)	4m 20s
test-mbedtls (ubuntu-20.04)	2m 49s
build-test (fedora-32, gcc)	4m 33s
test-mbedtls (ubuntu-22.04-mbedtls-3.1)	2m 47s
build-test (fedora-32, clang)	4m 53s
test-no-crypto-build	1m 16s
build-test (opensuse-leap, gcc)	4m 28s
build-test (opensuse-leap, clang)	4m 37s
test-tcti-config	14m 6s
build-test (ubuntu-22.04, gcc)	4m 45s
build-test (ubuntu-22.04, clang)	4m 35s
build-test (alpine-3.15, gcc)	4m 3s
coverity-test	0s
build-test (alpine-3.15, clang)	4m 49s
	1h 21m 10s

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