fix: display build timings when all timings are loaded (#15728)

- [Refetch timings until script timings are
present](https://github.com/coder/coder/commit/2181bec72b5334e5e15dc575d2234860be02920b)
- [Stay on loading state when agent script timings are
empty](https://github.com/coder/coder/commit/b16fad165c8733c60150b0dfce5df73ab2669e36)

Fix https://github.com/coder/coder/issues/15273

site/src/api/queries/workspaceBuilds.ts

@@ -58,17 +58,9 @@ export const infiniteWorkspaceBuilds = (
 };
 
 // We use readyAgentsCount to invalidate the query when an agent connects
-export const workspaceBuildTimings = (
-	workspaceBuildId: string,
-	readyAgentsCount: number,
-) => {
+export const workspaceBuildTimings = (workspaceBuildId: string) => {
 	return {
-		queryKey: [
-			"workspaceBuilds",
-			workspaceBuildId,
-			"timings",
-			{ readyAgentsCount },
-		],
+		queryKey: ["workspaceBuilds", workspaceBuildId, "timings"],
 		queryFn: () => API.workspaceBuildTimings(workspaceBuildId),
 	};
 };