all: use github.com/deckarep/golang-set/v2 (generic set) (#26159)

Co-authored-by: Felix Lange <fjl@twurst.com>

eth/fetcher/tx_fetcher.go

@@ -24,7 +24,7 @@ import (
 	"sort"
 	"time"
 
-	mapset "github.com/deckarep/golang-set"
+	mapset "github.com/deckarep/golang-set/v2"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/mclock"
 	"github.com/ethereum/go-ethereum/core/txpool"
@@ -148,7 +148,7 @@ type TxFetcher struct {
 	drop    chan *txDrop
 	quit    chan struct{}
 
-	underpriced mapset.Set // Transactions discarded as too cheap (don't re-fetch)
+	underpriced mapset.Set[common.Hash] // Transactions discarded as too cheap (don't re-fetch)
 
 	// Stage 1: Waiting lists for newly discovered transactions that might be
 	// broadcast without needing explicit request/reply round trips.
@@ -202,7 +202,7 @@ func NewTxFetcherForTests(
 		fetching:    make(map[common.Hash]string),
 		requests:    make(map[string]*txRequest),
 		alternates:  make(map[common.Hash]map[string]struct{}),
-		underpriced: mapset.NewSet(),
+		underpriced: mapset.NewSet[common.Hash](),
 		hasTx:       hasTx,
 		addTxs:      addTxs,
 		fetchTxs:    fetchTxs,