runtime/pprof: timeout in TestProfilerStackDepth

[gopherbot]

#!watchflakes
default <- pkg == "runtime/pprof" && test == "TestProfilerStackDepth"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestProfilerStackDepth
*** Test killed: ran too long (7m0s).

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime/pprof" && test == ""

2025-05-08 19:07 gotip-windows-amd64-race go@ac645eaa runtime/pprof [PASS] (log)

goos: windows
goarch: amd64
pkg: runtime/pprof
cpu: Intel(R) Xeon(R) CPU @ 2.00GHz
PASS
ok  	runtime/pprof	4.569s

— watchflakes