build_jobs are not killed on abort

[Blanca-Fuentes]

I think build jobs are not killed on abort

reframe/reframe/frontend/executors/__init__.py

Lines 514 to 524 in 73441fa

	def abort(self, cause=None):
	if self.failed or self._aborted:
	return
	logging.getlogger().debug2(f'Aborting test case: {self.testcase!r}')
	exc = AbortTaskError()
	exc.__cause__ = cause
	self._aborted = True
	try:
	if not self.zombie and self.check.job:
	self.check.job.cancel()

[vkarak]

@Blanca-Fuentes Do you have a reproducer?