Extract thirdparty/pq to go-ipfs-pq

This moves the `thirdparty/pq` package to https://github.com/ipfs/go-ipfs-pq .

History has been retained. The new package has been gx'ed and published.
Imports have been updated accordingly.

License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>

decision/peer_request_queue.go

@@ -5,8 +5,8 @@ import (
 	"time"
 
 	wantlist "github.com/ipfs/go-ipfs/exchange/bitswap/wantlist"
-	pq "github.com/ipfs/go-ipfs/thirdparty/pq"
 
+	pq "gx/ipfs/QmZUbTDJ39JpvtFCSubiWeUTQRvMA1tVE5RZCJrY4oeAsC/go-ipfs-pq"
 	peer "gx/ipfs/QmZoWKhxUmZ2seW4BzX6fJkNR8hh9PsGModr7q171yq2SS/go-libp2p-peer"
 	cid "gx/ipfs/QmcZfnkapfECQGcLZaf9B79NRg7cRa9EnZh4LSbkCzwNvY/go-cid"
 )