Set test headers via page.router API #8843

Job	Run time
validate-docs-links	11s
build-native / build	22s
build-next / build	43s
types and precompiled / build	53s
lint / build	1m 8s
test cargo integration / build	5m 6s
test cargo benchmarks / build	32s
rust check / build	23s
test cargo unit / build	24s
test next-swc wasm / build	2m 14s
test firefox and safari / build	4m 37s
test turbopack dev / build	1m 9s
test dev (1) / build	6m 17s
test dev (2) / build	6m 46s
test dev (3) / build	6m 14s
test integration (1) / build	5m 3s
test integration (10) / build	4m 56s
test integration (12) / build	4m 49s
test integration (2) / build	4m 43s
test integration (3) / build	5m 18s
test integration (11) / build	4m 48s
test integration (6) / build	5m 38s
test integration (4) / build	4m 53s
test integration (5) / build	4m 44s
test integration (8) / build	3m 42s
test integration (7) / build	3m 45s
test integration (9) / build	5m 47s
test prod (1) / build	5m 9s
test prod (2) / build	5m 31s
test prod (3) / build	5m 3s
test prod (4) / build	4m 59s
test prod (5) / build	5m 11s
test turbopack integration (1) / build	1m 12s
thank you, next	1s
report-test-results / build	40s
	2h 2m 51s

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