runtime: scheduler sometimes starves a runnable goroutine on wasm platforms [1.22 backport]

[gopherbot]

@bcmills requested issue #65178 to be considered for backport to the next 1.22 minor release.

@gopherbot, please backport to Go 1.22. The additional tests enabled in https://go.dev/cl/526117 made it more likely for this bug to be exposed in test runs, which may cause flakiness in pre-release (and backport CL) testing.

[gopherbot]

Change https://go.dev/cl/566175 mentions this issue: [release-branch.go1.22] net: work around runtime scheduler starvation on js and wasip1

[gopherbot]

Closed by merging f73eba7 to release-branch.go1.22.