[Turbopack] implement dispose root task #45054

Job	Run time
validate-docs-links	10s
Determine changes	8s
build-next / build	30s
optimize-ci / Graphite CI Optimizer	2s
build-native / build	27s
test devlow package	0s
test unit (18) / build	1m 8s
test unit (20) / build	1m 3s
ast-grep lint	20s
test cargo benches	0s
Run devlow benchmarks	0s
test turbopack dev	0s
test turbopack development integration	0s
test next-swc wasi	0s
test next-swc wasm	0s
test turbopack production	0s
test turbopack production integration	0s
test dev	0s
Test new tests for flakes (dev)	0s
Test new tests for flakes (prod)	0s
test prod	0s
test firefox and safari	0s
test integration	0s
test ppr dev	0s
test ppr integration	0s
test ppr prod	0s
types and precompiled / build	52s
lint / build	1m 58s
rust check / build	1m 54s
test cargo unit / build	7m 42s
rustdoc check / build	1m 48s
Test new tests when deployed	0s
report test results to datadog	43s
thank you, next	1s
	18m 46s

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