mkosi-initrd/vm: ensure TPM2 core modules are installed in the initrd

mkosi-initrd/vm: ensure TPM2 core modules are installed in the initrd

On arm64 the tpm_tis modules are not built-in, so /dev/tpmrm0 does
not show up in the initrd and it times out, and unlocking using
the tpm doesn't work.
Ensure the modules are included in the initrd if they are not
built in.

Jul 28 23:19:45 localhost systemd[1]: Expecting device dev-tpmrm0.device - /dev/tpmrm0...
Jul 28 23:19:48 localhost (udev-worker)[212]: ctx=0xaaab038cd650 path=/lib/modules/6.12.33+deb13-cloud-arm64/kernel/drivers/char/tpm/tpm_tis_core.ko.xz error=No such file or directory
Jul 28 23:19:49 localhost (udev-worker)[210]: ctx=0xaaab038cd650 path=/lib/modules/6.12.33+deb13-cloud-arm64/kernel/drivers/char/tpm/tpm_tis_core.ko.xz error=No such file or directory
Jul 28 23:21:11 localhost systemd[1]: dev-tpmrm0.device: Job dev-tpmrm0.device/start timed out.

https://oracle.github.io/kconfigs/?config=UTS_RELEASE&config=TCG_TIS&config=TCG_TIS_CORE