runtime: lock ordering problems

[bcmills]

#!watchflakes
post <- builder ~ `.*-staticlockranking` && log ~ `lock ordering problem`

(Pulled out from #55167, because these issues tend to be easier to diagnose; CC @golang/runtime)

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- builder ~ `.*-staticlockranking` && log ~ `lock ordering problem`

2023-01-17 19:55 linux-amd64-staticlockranking go@839c8425 runtime/trace.TestTraceFutileWakeup (log)

111172  ======
0 : hchan 15 0xc0000221d8
1 : hchan 15 0xc000022258
2 : traceStackTab 43 0x702a98
3 : wbufSpans 39 0x6fb6f0
fatal error: lock ordering problem

runtime stack:
runtime.throw({0x5c3185?, 0x1?})
	/workdir/go/src/runtime/panic.go:1047 +0x5d fp=0x7fe0337fd9c0 sp=0x7fe0337fd990 pc=0x439a9d
...
	/workdir/go/src/runtime/proc.go:387
runtime.semacquire1(0xc00019c118, 0x20?, 0x1, 0x0, 0x71?)
	/workdir/go/src/runtime/sema.go:160 +0x214 fp=0xc000063d60 sp=0xc000063cf8 pc=0x44de34
sync.runtime_Semacquire(0xc0001cc040?)
	/workdir/go/src/runtime/sema.go:62 +0x27 fp=0xc000063d98 sp=0xc000063d60 pc=0x46a5c7
sync.(*WaitGroup).Wait(0x8?)
	/workdir/go/src/sync/waitgroup.go:116 +0x4b fp=0xc000063dc0 sp=0xc000063d98 pc=0x4769ab
runtime/trace_test.TestTraceFutileWakeup(0xc0001a9ba0)
	/workdir/go/src/runtime/trace/trace_test.go:556 +0x399 fp=0xc000063f70 sp=0xc000063dc0 pc=0x56ec39
testing.tRunner(0xc0001a9ba0, 0x5cd9e0)

— watchflakes