Support Intel TDX confidential computing type configuration #1425
Description
/kind feature
Describe the solution you'd like
TDX is supported in c3 machine types in google cloud [0].
Allow the user to configure c3 machines as confidential-computing enabled TDX instances.
Recently #1410 was merged, which enabled SEV-SNP confidential computing instance configuration.
Anything else you would like to add:
[0] https://cloud.google.com/confidential-computing/confidential-vm/docs/supported-configurations#all-confidential-vm-instances