test: Use pathlib over os.path #28362

revert netutil chgs py3.8 compliant

fixes based on PR review

test/functional/rpc_bind.py

@@ -56,7 +56,7 @@ class RPCBindTest(BitcoinTestFramework):
         self.nodes[0].rpchost = None
         self.start_nodes([node_args])
         # connect to node through non-loopback interface
-        node = get_rpc_proxy(rpc_url(self.nodes[0].datadir, 0, self.chain, "%s:%d" % (rpchost, rpcport)), 0, coveragedir=self.options.coveragedir)
+        node = get_rpc_proxy(rpc_url(self.nodes[0].datadir_path, 0, self.chain, "%s:%d" % (rpchost, rpcport)), 0, coveragedir=self.options.coveragedir)
         node.getnetworkinfo()
         self.stop_nodes()