[KeyVault] Add createOctKey convenience method and relevant options. (Azure#13522)

## What

- Add `createOctKey` method to support creating keys of type `oct` and `oct-HSM`
- Add `createOctKeyOptions` supporting `hsm` (keySize is already supported at the `createKeyOptions` interface)

## Why

- This adds the same convenience layer we have for createEcKey, createRsaKey, etc....

Author: maorleger

sdk/keyvault/keyvault-keys/CHANGELOG.md

@@ -8,6 +8,7 @@
 - Added a constructor overload to `CryptographyClient` that takes a `JsonWebKey` and allows for local-only subset of operations.
 - Added `KeyId` to the public API of CryptographyClient.
 - Removed `parseKeyVaultKeysId` from the public API and made `KeyOptionsOptions.additionalAuthenticatedData` a readonly property.
+- Added a `createOctKey` convenience method to create a key of type `oct` or `oct-HSM` as appropriate.
 
 ## 4.2.0-beta.2 (2020-10-06)
 

sdk/keyvault/keyvault-keys/recordings/browsers/keys_client__create_read_update_and_delete_operations/recording_can_create_an_oct_key_with_options.json

@@ -42,6 +42,11 @@ export interface CreateKeyOptions extends coreHttp.OperationOptions {
     };
 }
 
+// @public
+export interface CreateOctKeyOptions extends CreateKeyOptions {
+    hsm?: boolean;
+}
+
 // @public
 export interface CreateRsaKeyOptions extends CreateKeyOptions {
     hsm?: boolean;
@@ -163,6 +168,7 @@ export class KeyClient {
     beginRecoverDeletedKey(name: string, options?: BeginRecoverDeletedKeyOptions): Promise<PollerLike<PollOperationState<DeletedKey>, DeletedKey>>;
     createEcKey(name: string, options?: CreateEcKeyOptions): Promise<KeyVaultKey>;
     createKey(name: string, keyType: KeyType, options?: CreateKeyOptions): Promise<KeyVaultKey>;
+    createOctKey(name: string, options?: CreateOctKeyOptions): Promise<KeyVaultKey>;
     createRsaKey(name: string, options?: CreateRsaKeyOptions): Promise<KeyVaultKey>;
     getDeletedKey(name: string, options?: GetDeletedKeyOptions): Promise<DeletedKey>;
     getKey(name: string, options?: GetKeyOptions): Promise<KeyVaultKey>;