chore: math lib update and type fixes (#12791)

## Description

Upgrades the math library in the repo root and find/replaces many usages of sdk.Dec, sdk.ZeroDec, sdk.OneDec, sdk.NewDec with their legacy-ified-math-lib replacements.

Note for review: I assume that I did not find 100% of usages

---

### 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...

- [ ] 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
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#pr-targeting))
- [ ] 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)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] 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)

x/slashing/simulation/genesis.go

@@ -8,6 +8,7 @@ import (
 	"math/rand"
 	"time"
 
+	"cosmossdk.io/math"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
 	"github.com/cosmos/cosmos-sdk/types/simulation"
@@ -29,7 +30,7 @@ func GenSignedBlocksWindow(r *rand.Rand) int64 {
 }
 
 // GenMinSignedPerWindow randomized MinSignedPerWindow
-func GenMinSignedPerWindow(r *rand.Rand) sdk.Dec {
+func GenMinSignedPerWindow(r *rand.Rand) math.LegacyDec {
 	return sdk.NewDecWithPrec(int64(r.Intn(10)), 1)
 }
 
@@ -39,13 +40,13 @@ func GenDowntimeJailDuration(r *rand.Rand) time.Duration {
 }
 
 // GenSlashFractionDoubleSign randomized SlashFractionDoubleSign
-func GenSlashFractionDoubleSign(r *rand.Rand) sdk.Dec {
-	return sdk.NewDec(1).Quo(sdk.NewDec(int64(r.Intn(50) + 1)))
+func GenSlashFractionDoubleSign(r *rand.Rand) math.LegacyDec {
+	return math.LegacyNewDec(1).Quo(math.LegacyNewDec(int64(r.Intn(50) + 1)))
 }
 
 // GenSlashFractionDowntime randomized SlashFractionDowntime
-func GenSlashFractionDowntime(r *rand.Rand) sdk.Dec {
-	return sdk.NewDec(1).Quo(sdk.NewDec(int64(r.Intn(200) + 1)))
+func GenSlashFractionDowntime(r *rand.Rand) math.LegacyDec {
+	return math.LegacyNewDec(1).Quo(math.LegacyNewDec(int64(r.Intn(200) + 1)))
 }
 
 // RandomizedGenState generates a random GenesisState for slashing

x/slashing/simulation/operations_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 	"time"
 
+	"cosmossdk.io/math"
 	"github.com/stretchr/testify/suite"
 	abci "github.com/tendermint/tendermint/abci/types"
 	tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
@@ -164,7 +165,7 @@ func (suite *SimTestSuite) TestSimulateMsgUnjail() {
 	suite.Require().NoError(err)
 	selfDelegation := stakingtypes.NewDelegation(val0AccAddress.Bytes(), validator0.GetOperator(), issuedShares)
 	suite.stakingKeeper.SetDelegation(ctx, selfDelegation)
-	suite.distrKeeper.SetDelegatorStartingInfo(ctx, validator0.GetOperator(), val0AccAddress.Bytes(), distrtypes.NewDelegatorStartingInfo(2, sdk.OneDec(), 200))
+	suite.distrKeeper.SetDelegatorStartingInfo(ctx, validator0.GetOperator(), val0AccAddress.Bytes(), distrtypes.NewDelegatorStartingInfo(2, math.LegacyOneDec(), 200))
 
 	// begin a new block
 	suite.app.BeginBlock(abci.RequestBeginBlock{Header: tmproto.Header{Height: suite.app.LastBlockHeight() + 1, AppHash: suite.app.LastCommitID().Hash, Time: blockTime}})
@@ -184,7 +185,7 @@ func (suite *SimTestSuite) TestSimulateMsgUnjail() {
 }
 
 func getTestingValidator0(ctx sdk.Context, stakingKeeper *stakingkeeper.Keeper, accounts []simtypes.Account) (stakingtypes.Validator, error) {
-	commission0 := stakingtypes.NewCommission(sdk.ZeroDec(), sdk.OneDec(), sdk.OneDec())
+	commission0 := stakingtypes.NewCommission(math.LegacyZeroDec(), math.LegacyOneDec(), math.LegacyOneDec())
 	return getTestingValidator(ctx, stakingKeeper, accounts, commission0, 0)
 }
 
@@ -202,7 +203,7 @@ func getTestingValidator(ctx sdk.Context, stakingKeeper *stakingkeeper.Keeper, a
 		return stakingtypes.Validator{}, fmt.Errorf("failed to set initial commission: %w", err)
 	}
 
-	validator.DelegatorShares = sdk.NewDec(100)
+	validator.DelegatorShares = math.LegacyNewDec(100)
 	validator.Tokens = sdk.NewInt(1000000)
 
 	stakingKeeper.SetValidator(ctx, validator)