PM-4877: Only allow replacing passkeys for the same userhandle (#9804)

* Initial draft

* small cleanup

* show vaul items without passkeys

* Refactored a bit

* tests run for me?

* Fixed platform test

* null and undefined

* lint

libs/common/src/platform/services/fido2/fido2-authenticator.service.spec.ts

@@ -215,6 +215,7 @@ describe("FidoAuthenticatorService", () => {
           expect(userInterfaceSession.confirmNewCredential).toHaveBeenCalledWith({
             credentialName: params.rpEntity.name,
             userName: params.userEntity.name,
+            userHandle: Fido2Utils.bufferToString(params.userEntity.id),
             userVerification,
             rpId: params.rpEntity.id,
           } as NewCredentialParams);

libs/common/src/platform/services/fido2/fido2-authenticator.service.ts

@@ -112,6 +112,7 @@ export class Fido2AuthenticatorService implements Fido2AuthenticatorServiceAbstr
       const response = await userInterfaceSession.confirmNewCredential({
         credentialName: params.rpEntity.name,
         userName: params.userEntity.name,
+        userHandle: Fido2Utils.bufferToString(params.userEntity.id),
         userVerification: params.requireUserVerification,
         rpId: params.rpEntity.id,
       });