[KeyVault] - Add live tests for SKR in KV

[maorleger]

SKR is not fully supported in Key Vault, only MHSM.

Once it is available globally in KV implement the following changes:

• Remove enableHsm conditions on mock attestation service elements in test-resources.json to install unconditionally (assuming Dynamically deploy attestation service as part of test-resources deployment #20404 is complete, disregard otherwise)
• Ensure the same suite of tests are run against MHSM and KV (depending on your infrastructure, you might remove some annotation or you might need to duplicate the tests)
  • Note (11/5/21): Creating a key with a release policy and releasing it currently works on Key Vault and Managed HSM. However, importing a key with a release policy, or updating a key's existing release policy, work on Managed HSM but not Key Vault.
    • Importing a key with a release policy specified results in a key that has None for a release policy.
    • Updating a key's release policy fails with the following error, even when the exportable attribute isn't specified in update_key_properties: azure.core.exceptions.HttpResponseError: (BadParameter) AKV.SKR.1014: Cannot modify the exportable state of a key.