[24.0] Delay tool form rendering until config is loaded

[mvdbeek]

The config typically is already loaded once you hit the tool form, so this shouldn't cause a delay, and we already do the same effectively for the current user and current history id.

Fixes https://github.com/galaxyproject/galaxy/issues/18139

TypeError: e.config is null
  at $b (webpack://@galaxyproject/galaxy-client/./src/components/Tool/ToolForm.vue?5639:1:1709)
  at Vue.prototype._render (webpack://@galaxyproject/galaxy-client/./node_modules/vue/dist/vue.esm.js:2540:28)
  at updateComponent (webpack://@galaxyproject/galaxy-client/./node_modules/vue/dist/vue.esm.js:2980:27)
  at Watcher.prototype.get (webpack://@galaxyproject/galaxy-client/./node_modules/vue/dist/vue.esm.js:4164:33)
  at Watcher.prototype.run (webpack://@galaxyproject/galaxy-client/./node_modules/vue/dist/vue.esm.js:4240:30)
...
(3 additional frame(s) were not displayed)

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