Description of problem:
Error message changed to a unhelpful message when QEMU fails with vtpm migration

Version-Release number of selected component (if applicable):
libvirt-8.0.0-6.el9.x86_64
qemu-kvm-6.2.0-10.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Install swtpm and swtpm-tools on both hosts.

1. yum install swtpm swtpm-tools

2. Create vtpm secret with same uuid but different values on both hosts.

1. virsh secret-list
   UUID Usage
   -----------------------------------------------------------
   1498c26a-fead-4b2f-8071-94f2aa6ca0c0 vtpm VTPM_example

3. Start guest with encrypted vtpm on source host.
<tpm model='tpm-crb'>
<backend type='emulator' version='2.0'>
<encryption secret='1498c26a-fead-4b2f-8071-94f2aa6ca0c0'/>
</backend>
<alias name='tpm0'/>
</tpm>

4. Migrate guest to target host.

1. virsh -c 'qemu:///system' migrate --live --verbose --domain avocado-vt-vm1 --desturi qemu+ssh://X.X.X.X/system
   Migration: [ 98 %]error: operation failed: domain is no longer running

5. Check guest log on target host.

1. cat /var/log/libvirt/qemu/vm1.log
   ...
   2022-03-07T02:46:53.281294Z qemu-kvm: tpm-emulator: Setting the stateblob (type 1) failed with a TPM error 0x21 decryption error
   2022-03-07T02:46:53.281312Z qemu-kvm: error while loading state for instance 0x0 of device 'tpm-emulator'
   2022-03-07T02:46:53.281713Z qemu-kvm: load of migration failed: Input/output error
   2022-03-07 02:46:53.499+0000: shutting down, reason=crashed

Actual results:
libvirt report following error message:
error: operation failed: domain is no longer running

Expected results:
libvirt report following error message:
qemu-kvm: tpm-emulator: Setting the stateblob (type 1) failed with a TPM error 0x21 decryption error
qemu-kvm: error while loading state for instance 0x0 of device 'tpm-emulator'
qemu-kvm: load of migration failed: Input/output error

Additional info:
Cannot reproduce this issue on libvirt-7.10.0-1.

1. virsh -c 'qemu:///system' migrate --live --verbose --domain avocado-vt-vm1 --desturi qemu+ssh://X.X.X.X/system
   Migration: [ 89 %]error: internal error: qemu unexpectedly closed the monitor: 2022-01-06T18:18:00.877274Z qemu-kvm: tpm-emulator: Setting the stateblob (type 1) failed with a TPM error 0x21 decryption error
   2022-01-06T18:18:00.877312Z qemu-kvm: error while loading state for instance 0x0 of device 'tpm-emulator'
   2022-01-06T18:18:00.877780Z qemu-kvm: load of migration failed: Input/output error