feat(nextjs): Disable server webpack-handling for static builds (#15751)

When static builds are enabled, Sentry should not change webpack
configuration for the server/edge runtime as there is no server.

closes #12420

Author: s1gr1d

packages/nextjs/src/config/webpack.ts

@@ -349,9 +349,11 @@ export function constructWebpackConfigFunction(
       }
     }
 
-    // We don't want to do any webpack plugin stuff OR any source maps stuff in dev mode.
+    const isStaticExport = userNextConfig?.output === 'export';
+
+    // We don't want to do any webpack plugin stuff OR any source maps stuff in dev mode or for the server on static-only builds.
     // Symbolication for dev-mode errors is done elsewhere.
-    if (!isDev) {
+    if (!(isDev || (isStaticExport && isServer))) {
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
       const { sentryWebpackPlugin } = loadModule<{ sentryWebpackPlugin: any }>('@sentry/webpack-plugin', module) ?? {};