all: more linters (#24783)

This enables the following linters

- typecheck
- unused
- staticcheck
- bidichk
- durationcheck
- exportloopref
- gosec

WIth a few exceptions.

- We use a deprecated protobuf in trezor. I didn't want to mess with that, since I cannot meaningfully test any changes there.
- The deprecated TypeMux is used in a few places still, so the warning for it is silenced for now.
- Using string type in context.WithValue is apparently wrong, one should use a custom type, to prevent collisions between different places in the hierarchy of callers. That should be fixed at some point, but may require some attention.
- The warnings for using weak random generator are squashed, since we use a lot of random without need for cryptographic guarantees.

cmd/devp2p/internal/ethtest/snap.go

@@ -104,6 +104,7 @@ func (s *Suite) TestSnapGetAccountRange(t *utesting.T) {
 		// Max bytes: 0. Expect to deliver one account.
 		{0, root, zero, ffHash, 1, firstKey, firstKey},
 	} {
+		tc := tc
 		if err := s.snapGetAccountRange(t, &tc); err != nil {
 			t.Errorf("test %d \n root: %x\n range: %#x - %#x\n bytes: %d\nfailed: %v", i, tc.root, tc.origin, tc.limit, tc.nBytes, err)
 		}
@@ -194,6 +195,7 @@ func (s *Suite) TestSnapGetStorageRanges(t *utesting.T) {
 			expSlots: 2,
 		},
 	} {
+		tc := tc
 		if err := s.snapGetStorageRanges(t, &tc); err != nil {
 			t.Errorf("test %d \n root: %x\n range: %#x - %#x\n bytes: %d\n #accounts: %d\nfailed: %v",
 				i, tc.root, tc.origin, tc.limit, tc.nBytes, len(tc.accounts), err)
@@ -291,6 +293,7 @@ func (s *Suite) TestSnapGetByteCodes(t *utesting.T) {
 			expHashes: 4,
 		},
 	} {
+		tc := tc
 		if err := s.snapGetByteCodes(t, &tc); err != nil {
 			t.Errorf("test %d \n bytes: %d\n #hashes: %d\nfailed: %v", i, tc.nBytes, len(tc.hashes), err)
 		}
@@ -436,6 +439,7 @@ func (s *Suite) TestSnapTrieNodes(t *utesting.T) {
 			},
 		},
 	} {
+		tc := tc
 		if err := s.snapGetTrieNodes(t, &tc); err != nil {
 			t.Errorf("test %d \n #hashes %x\n root: %#x\n bytes: %d\nfailed: %v", i, len(tc.expHashes), tc.root, tc.nBytes, err)
 		}

cmd/devp2p/internal/v5test/framework.go

@@ -60,11 +60,9 @@ type conn struct {
 	remoteAddr *net.UDPAddr
 	listeners  []net.PacketConn
 
-	log           logger
-	codec         *v5wire.Codec
-	lastRequest   v5wire.Packet
-	lastChallenge *v5wire.Whoareyou
-	idCounter     uint32
+	log       logger
+	codec     *v5wire.Codec
+	idCounter uint32
 }
 
 type logger interface {