ci: move fuzz target test to a separate job
ci: move fuzz target test to a separate job

Fuzzing requires Clang and currently runs redundant integration tests
before the fuzz target test, so move it to a separate job that is only
run with Clang instead.

Signed-off-by: Jonas Witschel <87a164e5d00d5dcdd001e37b34ea8bcd3fc3a172@gmx.de>

tpm2-software/tpm2-tss,01org/TPM2.0-TSS,tpm2-software/tpm2-tss,01org/tpm2-tss,01org/tpm2-tss,01org/TPM2.0-TSS,01org/TPM2.0-TSS,01org/tpm2-tss,tpm2-software/tpm2-tss,01org/TPM2.0-TSS