lint(evm): waive containedctx where an interface forces the field

LFDT-Panurus#2180 enabled containedctx and fixed the ttx occurrence. The evm module is a
separate Go module and was not linted in that pass, so make lint has been
failing on it since.

Neither field can be dropped. Ledger.ctx exists because driver.GetStateFnc
passes no context to GetState, and fakeContext.ctx exists because it
implements view.Context, whose Context() method has to return one.

Signed-off-by: atharrva01 <atharvaborade568@gmail.com>

Author: atharrva01

x/token/services/network/evm/endorsement/fakes_test.go

@@ -69,7 +69,9 @@ func (s *pipeSession) Close() {}
 // own session via Session. Everything the endorsement views do not touch panics, so an unexpected
 // dependency surfaces loudly rather than silently.
 type fakeContext struct {
-	ctx      context.Context
+	// view.Context is an interface whose Context() method returns one, so an implementation of it has
+	// to hold a context.
+	ctx      context.Context //nolint:containedctx
 	me       view.Identity
 	sessions map[string]view.Session // keyed by party UniqueID, for GetSession (initiator side)
 	own      view.Session            // for Session() (responder side)

x/token/services/network/evm/endorsement/ledger.go

@@ -34,7 +34,9 @@ const getTokenMethod = "getToken(bytes32)" // #nosec G101 -- ABI method signatur
 // Ledger satisfies token.Ledger, so it can be passed straight to
 // Validator.UnmarshallAndVerifyWithMetadata.
 type Ledger struct {
-	ctx        context.Context
+	// GetState takes no context (driver.GetStateFnc has none), so the one to read the chain with is
+	// captured here. A Ledger is built per request and used only for it, so it stays short-lived.
+	ctx        context.Context //nolint:containedctx
 	client     client.EVMClient
 	tokenState client.Address
 	blockTag   string