accounts/abi/bind: fix bounded contracts and sim backend for 1559 (#23038)

* accounts/abi/bind: fix bounded contracts and sim backend for 1559

* accounts/abi/bind, ethclient: don't rely on chain config for gas prices

* all: enable London for all internal tests

* les: get receipt type info in les tests

* les: fix weird test

Co-authored-by: Martin Holst Swende <martin@swende.se>

eth/gasprice/gasprice_test.go

@@ -68,6 +68,8 @@ func newTestBackend(t *testing.T, londonBlock *big.Int) *testBackend {
 	if londonBlock != nil {
 		gspec.Config.LondonBlock = londonBlock
 		signer = types.LatestSigner(gspec.Config)
+	} else {
+		gspec.Config.LondonBlock = nil
 	}
 	engine := ethash.NewFaker()
 	db := rawdb.NewMemoryDatabase()