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

codec/proto_codec.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"strings"
 
-	legacyproto "github.com/golang/protobuf/proto"
+	legacyproto "github.com/golang/protobuf/proto" //nolint:staticcheck // we're aware this is deprecated and using it anyhow.
 	"google.golang.org/grpc/encoding"
 	"google.golang.org/protobuf/proto"