feat: add filtering by service account (#23468)

You can now filter by/out service accounts using
`service_account:true/false` or using the filter dropdown.

coderd/database/queries/users.sql

@@ -344,11 +344,12 @@ WHERE
 			created_at >= @created_after
 		ELSE true
 	END
-  	AND CASE
-  	    WHEN @include_system::bool THEN TRUE
-  	    ELSE
-			is_system = false
+	-- Filter by system type
+	AND CASE
+		WHEN @include_system::bool THEN TRUE
+		ELSE is_system = false
 	END
+	-- Filter by github.com user ID
 	AND CASE
 		WHEN @github_com_user_id :: bigint != 0 THEN
 			github_com_user_id = @github_com_user_id
@@ -360,6 +361,12 @@ WHERE
 			login_type = ANY(@login_type :: login_type[])
 		ELSE true
 	END
+	-- Filter by service account.
+	AND CASE
+		WHEN sqlc.narg('is_service_account') :: boolean IS NOT NULL THEN
+			is_service_account = sqlc.narg('is_service_account') :: boolean
+		ELSE true
+	END
 	-- End of filters
 
 	-- Authorize Filter clause will be injected below in GetAuthorizedUsers