NodeApp.make_empty must pass os_ops and port_manager to nodes

[dmitry-lipetsk]

Constructor of NodeApp obtains os_ops but does not pass it to a new node. See this code:

testgres/testgres/node.py

Lines 2335 to 2346 in 44d61c2

	self.os_ops = os_ops
	def make_empty(
	self,
	base_dir=None,
	port=None,
	bin_dir=None):
	real_base_dir = os.path.join(self.test_path, base_dir)
	self.os_ops.rmdirs(real_base_dir, ignore_errors=True)
	self.os_ops.makedirs(real_base_dir)
	node = PostgresNode(base_dir=real_base_dir, port=port, bin_dir=bin_dir)

Also, the constructor of NodeApp can get port_manager object and pass it to the new nodes in make_empty, too.