FAPI: Fix usage of endorsement handle #1749

Job	Run time
test-coverage	5m 9s
scanbuild	6m 36s
build-test (ubuntu-18.04, gcc)	4m 57s
test-fuzz	2m 36s
build-test (ubuntu-18.04, clang)	5m 15s
test-no-crypto-build	1m 25s
build-test (ubuntu-20.04, gcc)	4m 58s
test-mbedtls (ubuntu-20.04)	2m 56s
build-test (ubuntu-20.04, clang)	4m 40s
test-tcti-config	13m 50s
test-mbedtls (ubuntu-22.04-mbedtls-3.1)	2m 52s
build-test (fedora-32, gcc)	5m 12s
build-test (fedora-32, clang)	5m 29s
coverity-test	0s
build-test (opensuse-leap, gcc)	5m 0s
build-test (opensuse-leap, clang)	5m 11s
build-test (ubuntu-22.04, gcc)	6m 5s
build-test (ubuntu-22.04, clang)	5m 58s
build-test (alpine-3.15, gcc)	4m 17s
build-test (alpine-3.15, clang)	5m 16s
	1h 37m 42s

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