Add key_fingerprint_sha256 to ssh signature type

Currently we are allowing users to see the fingerprint for SSH signed commits. .

For a security reasons we need to migrate this component into Vue. All required data was already added to GraphQl signature field. But the key_fingerprint_sha256 is missing.

It should be added to the signature with SshSignature type.

Also we show some info about X09 signatures

So XO9 certificate subject and XO9 certificate issuer are also desired fields

Availability and Testing

Regression testing in the MR - make sure all tests are still passing including e2e:package-and-test