CI: Increase setup timeout to 20min, add timestamps

• Increase qemu-1-setup.sh timeout to 20min since it sometimes fails to complete after 15min.

• Timestamp all qemu-1-setup.sh lines to look for hangs.

• Add a 'watchdog' process to print out the top running process every 30sec to help with debugging.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #17714