feat: List users by metadata (#10415)

# Which Problems Are Solved

Some users have reported the need of retrieving users given a metadata
key, metadata value or both. This change introduces metadata search
filter on the `ListUsers()` endpoint to allow Zitadel users to search
for user records by metadata.

The changes affect only v2 APIs.

# How the Problems Are Solved

- Add new search filter to `ListUserRequest`: `MetaKey` and `MetaValue`
  - Add SQL indices on metadata key and metadata value
  - Update query to left join `user_metadata` table

# Additional Context

  - Closes #9053
  - Depends on https://github.com/zitadel/zitadel/pull/10567

---------

Co-authored-by: Silvan <27845747+adlerhurst@users.noreply.github.com>
Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

(cherry picked from commit 8df402fb4f)

internal/api/grpc/user/v2beta/integration_test/user_test.go

@@ -44,11 +44,11 @@ func TestMain(m *testing.M) {
 
 		Instance = integration.NewInstance(ctx)
 
-		UserCTX = Instance.WithAuthorization(ctx, integration.UserTypeNoPermission)
-		IamCTX = Instance.WithAuthorization(ctx, integration.UserTypeIAMOwner)
-		LoginCTX = Instance.WithAuthorization(ctx, integration.UserTypeLogin)
+		UserCTX = Instance.WithAuthorizationToken(ctx, integration.UserTypeNoPermission)
+		IamCTX = Instance.WithAuthorizationToken(ctx, integration.UserTypeIAMOwner)
+		LoginCTX = Instance.WithAuthorizationToken(ctx, integration.UserTypeLogin)
 		SystemCTX = integration.WithSystemAuthorization(ctx)
-		CTX = Instance.WithAuthorization(ctx, integration.UserTypeOrgOwner)
+		CTX = Instance.WithAuthorizationToken(ctx, integration.UserTypeOrgOwner)
 		Client = Instance.Client.UserV2beta
 		return m.Run()
 	}())