chore: Move remaining auth methods to plugins (#4900)

* Move Google, Email, and Azure to plugins

* Move OIDC provider, remove old loading code

* Move AuthLogo to plugin

* AuthLogo -> PluginIcon

* Lazy load plugin settings

plugins/google/client/Icon.tsx

@@ -0,0 +1,26 @@
+import * as React from "react";
+
+type Props = {
+  /** The size of the icon, 24px is default to match standard icons */
+  size?: number;
+  /** The color of the icon, defaults to the current text color */
+  fill?: string;
+  className?: string;
+};
+
+function GoogleLogo({ size = 24, fill = "currentColor", className }: Props) {
+  return (
+    <svg
+      fill={fill}
+      width={size}
+      height={size}
+      viewBox="0 0 24 24"
+      xmlns="http://www.w3.org/2000/svg"
+      className={className}
+    >
+      <path d="M19.2312 10.5455H11.8276V13.6364H16.0892C15.6919 15.6 14.0306 16.7273 11.8276 16.7273C9.22733 16.7273 7.13267 14.6182 7.13267 12C7.13267 9.38182 9.22733 7.27273 11.8276 7.27273C12.9472 7.27273 13.9584 7.67273 14.7529 8.32727L17.0643 6C15.6558 4.76364 13.85 4 11.8276 4C7.42159 4 3.88232 7.56364 3.88232 12C3.88232 16.4364 7.42159 20 11.8276 20C15.8002 20 19.4117 17.0909 19.4117 12C19.4117 11.5273 19.3395 11.0182 19.2312 10.5455Z" />
+    </svg>
+  );
+}
+
+export default GoogleLogo;