fix(react-router): preserve sourcemaps.disable override #45176

Job	Run time
job_get_metadata / Get Metadata	6s
Check lockfile	3m 9s
Check file formatting	39s
Check PR branches	5s
Build	7m 1s
Cloudflare Integration Tests	1m 1s
Circular Dependency Check	1m 47s
Lint	1m 8s
Browser Unit Tests	1m 37s
Prepare E2E tests	2m 47s
Check for faulty .d.ts files	44s
Node (18) Unit Tests	1m 41s
Size Check	2m 9s
Node (20) Unit Tests	1m 40s
Node (24) Unit Tests	1m 39s
Node (22) Unit Tests	1m 54s
Node Overhead Check	0s
PW ${{ matrix.bundle }} Tests	0s
Node (${{ matrix.node }})${{ (((matrix.typescript && format(' (TS {0})', matrix.typescript))) \|\| '') }} Integration Tests	0s
Remix (Node ${{ matrix.node }}) Tests	0s
Bun Unit Tests	0s
Deno Unit Tests	0s
Node (${{ matrix.node }})${{ (((matrix.typescript && format(' (TS {0})', matrix.typescript))) \|\| '') }} Node-Core Integration Tests	0s
Upload Artifacts	0s
Playwright ${{ matrix.bundle }}${{ ((matrix.project && (matrix.project != 'chromium') && format(' {0}', matrix.project)) \|\| '') }}${{ ((matrix.shard && format(' ({0}/{1})', matrix.shard, matrix.shards)) \|\| '') }} Tests	0s
E2E react-router-7-framework-spa-node-20-18 Test	2m 45s
E2E react-router-7-framework-instrumentation Test (optional)	2m 35s
E2E hydrogen-react-router-7 Test	3m 6s
E2E react-router-7-framework-node-20-18 Test	2m 41s
E2E react-router-7-framework-spa Test	2m 24s
E2E react-router-7-framework Test	2m 38s
E2E react-router-7-framework (latest) Test	2m 47s
E2E react-router-7-framework-custom Test	2m 35s
All required jobs passed or were skipped	4s
	50m 42s

Provide feedback