test(nextjs): Add test case to assert no duplicate root spans for pages router #53472

Job	Run time
Get CI Metadata / Get Metadata	8s
Check PR branches	4s
Build	1m 44s
Check file formatting	55s
Check lockfile	0s
Lint	1m 12s
Browser Unit Tests	56s
Build bundles	3m 25s
Circular Dependency Check	1m 37s
Build tarballs	2m 25s
Node (24) Unit Tests	41s
Node (22) Unit Tests	43s
Check for faulty .d.ts files	38s
Node (26) Unit Tests	43s
Node (20.19) Unit Tests	42s
Bun Unit Tests	0s
Deno Unit Tests	0s
Bundler Plugin Integration Tests (Node ${{ matrix.node }})	0s
Bun Integration Tests	0s
Cloudflare Integration Tests	0s
Deno Integration Tests	0s
Node (${{ matrix.node }})${{ (((matrix.typescript && format(' (TS {0})', matrix.typescript))) \|\| '') }} Integration Tests	0s
Build Lambda layer	0s
E2E nextjs-pages-dir Test	3m 18s
E2E nextjs-pages-dir (next@15) Test	2m 51s
E2E ${{ (matrix.label \|\| matrix.test-application) }} Test (optional)	-1s
Size Check	2m 34s
Upload Artifacts	0s
PW ${{ matrix.bundle }} Tests	0s
Playwright ${{ matrix.bundle }}${{ ((matrix.project && (matrix.project != 'chromium') && format(' {0}', matrix.project)) \|\| '') }}${{ ((matrix.shard && format(' ({0}/{1})', matrix.shard, matrix.shards)) \|\| '') }} Tests	0s
All required jobs passed or were skipped	6s
	24m 41s

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