test: do not fail TEST-86-MULTI-PROFILE-UKI if full TPM2 support not available

test: do not fail TEST-86-MULTI-PROFILE-UKI if full TPM2 support not available

On a mkosi run on GHA:

[    9.547863] TEST-86-MULTI-PROFILE-UKI.sh[458]: + /usr/lib/systemd/systemd-measure --current
[    9.552790] TEST-86-MULTI-PROFILE-UKI.sh[463]: Measuring boot phases: enter-initrd, enter-initrd:leave-initrd, enter-initrd:leave-initrd:sysinit, enter-initrd:leave-initrd:sysinit:ready
[    9.553086] TEST-86-MULTI-PROFILE-UKI.sh[463]: Found container virtualization none.
[    9.553308] TEST-86-MULTI-PROFILE-UKI.sh[463]: Reading EFI variable /sys/firmware/efi/efivars/LoaderTpm2ActivePcrBanks-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f.
[    9.553486] TEST-86-MULTI-PROFILE-UKI.sh[463]: Loaded shared library 'libtss2-esys.so.0' via dlopen().
[    9.553676] TEST-86-MULTI-PROFILE-UKI.sh[463]: Loaded shared library 'libtss2-rc.so.0' via dlopen().
[    9.553867] TEST-86-MULTI-PROFILE-UKI.sh[463]: Loaded shared library 'libtss2-mu.so.0' via dlopen().
[    9.554050] TEST-86-MULTI-PROFILE-UKI.sh[463]: Sorry, system lacks full TPM2 support.
[FAILED] Failed to start TEST-86-MULTI-PROFILE-UKI.service - TEST-86-MULTI-PROFILE-UKI.