When heart cycles we need to unregister the old port before
starting the new heart port program.

OTP-10591

* lukas/rcs-ppc-cross-tests/OTP-10265:
  Skip ct_netconf tests if there is no crypto
  Migrate timers from test_server to ct interface
  Update tests to run with an oldshell emulator
  Move crypto check so that tc is skipped and not failed
  Update for new version of ppc compilation chain
  Verify that ebin folder of applications exists

* egil/ensure-erl_crash.dump/OTP-10422:
  test: Relax timeouts for heart_SUITE
  erts: Fix crash dump write to port hack
  erts: Fix lock check assertion
  doc: Document ERL_CRASH_DUMP_SECONDS behaviour
  test: Add test for heart restart on crash
  test: Add test for heart restart on crash
  erts: Change ERL_CRASH_DUMP_SECONDS behaviour
  test: Refactor away ?line macros in heart_SUITE
  erts: Search for heart in ports that are alive
  heart: Refactor heart debugging
  erts, heart: Ensure erl_crash.dump is written

Timeouts were set too narrow and timedout on slow machines

Some of the tests which tested shell output assumed that
when starting a shell using `erl` a shell with newshell
was used. This is not true for systems built with
--disable-termcap, so the on some embedded systems those
tests failed.

* heart reboot behaviour
* erl_crash.dump file write behaviour

* node_start_soon_after_crash tests that heart restarts
  beam upon a crash and only lets beam write its crash
  dump for a certain amount of time