chore: sdk.Int to math.Int (cosmos#12132)

## Description

When locally working with golangci-lint, we can see that there were many deprecation warnings about sdk.Int.  This PR resolves that and makes 1-2 other linting related changes.  Issue on linting coming next.

This also moves BitCurve to bitCurve.

I expect that this set of changes will require several pull requests, one of them to the settings for the linter. 

It also does a gofumpt, because we had various formatting-related linters fail, too. 


---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#pr-targeting))
- [x] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#testing)
- [x] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [x] reviewed "Files changed" and left comments if necessary
- [x] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

app.go

@@ -346,11 +346,13 @@ func NewSimApp(
 	// NOTE: Capability module must occur first so that it can initialize any capabilities
 	// so that other modules that want to create or claim capabilities afterwards in InitChain
 	// can do so safely.
-	genesisModuleOrder := []string{capabilitytypes.ModuleName, authtypes.ModuleName, banktypes.ModuleName,
+	genesisModuleOrder := []string{
+		capabilitytypes.ModuleName, authtypes.ModuleName, banktypes.ModuleName,
 		distrtypes.ModuleName, stakingtypes.ModuleName, slashingtypes.ModuleName, govtypes.ModuleName,
 		minttypes.ModuleName, crisistypes.ModuleName, genutiltypes.ModuleName, evidencetypes.ModuleName, authz.ModuleName,
 		feegrant.ModuleName, nft.ModuleName, group.ModuleName, paramstypes.ModuleName, upgradetypes.ModuleName,
-		vestingtypes.ModuleName}
+		vestingtypes.ModuleName,
+	}
 	app.ModuleManager.SetOrderInitGenesis(genesisModuleOrder...)
 	app.ModuleManager.SetOrderExportGenesis(genesisModuleOrder...)
 
@@ -434,7 +436,6 @@ func (app *SimApp) setAnteHandler(txConfig client.TxConfig, indexEventsStr []str
 			SigGasConsumer:  ante.DefaultSigVerificationGasConsumer,
 		},
 	)
-
 	if err != nil {
 		panic(err)
 	}

test_helpers.go

@@ -6,8 +6,6 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
-	"github.com/cosmos/cosmos-sdk/depinject"
-	bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
 	"strconv"
 	"testing"
 	"time"
@@ -21,6 +19,9 @@ import (
 	dbm "github.com/tendermint/tm-db"
 
 	bam "github.com/cosmos/cosmos-sdk/baseapp"
+	"cosmossdk.io/math"
+	"github.com/cosmos/cosmos-sdk/depinject"
+	bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
 	"github.com/cosmos/cosmos-sdk/client"
 	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
 	cryptocodec "github.com/cosmos/cosmos-sdk/crypto/codec"
@@ -306,7 +307,7 @@ func createIncrementalAccounts(accNum int) []sdk.AccAddress {
 }
 
 // AddTestAddrsFromPubKeys adds the addresses into the SimApp providing only the public keys.
-func AddTestAddrsFromPubKeys(app *SimApp, ctx sdk.Context, pubKeys []cryptotypes.PubKey, accAmt sdk.Int) {
+func AddTestAddrsFromPubKeys(app *SimApp, ctx sdk.Context, pubKeys []cryptotypes.PubKey, accAmt math.Int) {
 	initCoins := sdk.NewCoins(sdk.NewCoin(app.StakingKeeper.BondDenom(ctx), accAmt))
 
 	for _, pk := range pubKeys {
@@ -316,17 +317,17 @@ func AddTestAddrsFromPubKeys(app *SimApp, ctx sdk.Context, pubKeys []cryptotypes
 
 // AddTestAddrs constructs and returns accNum amount of accounts with an
 // initial balance of accAmt in random order
-func AddTestAddrs(app *SimApp, ctx sdk.Context, accNum int, accAmt sdk.Int) []sdk.AccAddress {
+func AddTestAddrs(app *SimApp, ctx sdk.Context, accNum int, accAmt math.Int) []sdk.AccAddress {
 	return addTestAddrs(app, ctx, accNum, accAmt, createRandomAccounts)
 }
 
 // AddTestAddrsIncremental constructs and returns accNum amount of accounts with an
 // initial balance of accAmt in random order
-func AddTestAddrsIncremental(app *SimApp, ctx sdk.Context, accNum int, accAmt sdk.Int) []sdk.AccAddress {
+func AddTestAddrsIncremental(app *SimApp, ctx sdk.Context, accNum int, accAmt math.Int) []sdk.AccAddress {
 	return addTestAddrs(app, ctx, accNum, accAmt, createIncrementalAccounts)
 }
 
-func addTestAddrs(app *SimApp, ctx sdk.Context, accNum int, accAmt sdk.Int, strategy GenerateAccountStrategy) []sdk.AccAddress {
+func addTestAddrs(app *SimApp, ctx sdk.Context, accNum int, accAmt math.Int, strategy GenerateAccountStrategy) []sdk.AccAddress {
 	testAddrs := strategy(accNum)
 
 	initCoins := sdk.NewCoins(sdk.NewCoin(app.StakingKeeper.BondDenom(ctx), accAmt))