chore: Db linting (#12141)

* mainly sdk.int to cosmossdk.io/math

* staking keys

* fumpt

* var-naming linter errors and a fumpt

* Update CHANGELOG.md

* Update .golangci.yml

* Update CHANGELOG.md

* Update test_helpers.go

* Update test_helpers.go

* fumpt and lint

* this lints the db module, and makes it easier to use.  It adds breaking name changes

* DBConnection -> Connection

* previous commit contained a merge error

* Update test_helpers.go

* Update test_helpers.go

* db renamings

* merge master

* changelog

* DBWriter -> Writer

* consistent multistore reciever

* standard recievers for multistore v2alpha1

* general cleanup of linting issues

* more linter fixes

* remove prealloc linter

* nolint the secp256k1 import

* nolint the secp256k1 package

* completenolint resulting in a diff that has only nolints

testutil/testdata/codec.go

@@ -33,7 +33,7 @@ func RegisterInterfaces(registry types.InterfaceRegistry) {
 		&HasHasAnimal{},
 	)
 	registry.RegisterImplementations(
-		(*tx.TxExtensionOptionI)(nil),
+		(*tx.ExtensionOptionI)(nil),
 		&Cat{},
 	)