[Import-AzKeyVaultSecurityDomain]: Add Parameter For Providing Private Key Password

### Description of the new feature

The az cli command (az keyvault security-domain restore-blob) to encrypt a security domain blob file with exchange key has an option to provide passwords for the private keys. The equivalent powershell command (Import-AzKeyVaultSecurityDomain) has no such option. To use the powershell command it needs the private keys without any password protection. This is risky and would be better if the password for private keys can be provided during the security domain encrypt/decrypt process.

az keyvault security-domain restore-blob: https://learn.microsoft.com/en-us/cli/azure/keyvault/security-domain?view=azure-cli-latest#az-keyvault-security-domain-restore-blob
Import-AzKeyVaultSecurityDomain: https://learn.microsoft.com/en-us/powershell/module/az.keyvault/import-azkeyvaultsecuritydomain?view=azps-11.3.0

### Proposed implementation details (optional)

_No response_