feat(staking): migrate x/params away from x/staking (#12409)

## Description
Deprecate the usage of the now legacy x/params module within x/staking.

Closes: #12285



---

### Author Checklist

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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

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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)

CHANGELOG.md

@@ -68,6 +68,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/mint) [#12363](https://github.com/cosmos/cosmos-sdk/pull/12363) Migrate `x/mint` to self-managed parameters and deprecate it's usage of `x/params`.
 * (x/distribution) [#12434](https://github.com/cosmos/cosmos-sdk/pull/12434) Migrate `x/distribution` to self-managed parameters and deprecate it's usage of `x/params`.
 * (x/crisis) [#12445](https://github.com/cosmos/cosmos-sdk/pull/12445) Migrate `x/crisis` to self-managed parameters and deprecate it's usage of `x/params`.
+* (x/staking) [#12409](https://github.com/cosmos/cosmos-sdk/pull/12409) Migrate `x/staking` to self-managed parameters and deprecate it's usage of `x/params`.
+
 
 ### API Breaking Changes
 
@@ -84,6 +86,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/staking) [#12102](https://github.com/cosmos/cosmos-sdk/pull/12102) Staking keeper now is passed by reference instead of copy. Keeper's SetHooks no longer returns keeper. It updates the keeper in place instead.
 * (linting) [#12141](https://github.com/cosmos/cosmos-sdk/pull/12141) Fix usability related linting for database.  This means removing the infix Prefix from `prefix.NewPrefixWriter` and such so that it is `prefix.NewWriter` and making `db.DBConnection` and such into `db.Connection`
 * (x/distribution) [#12434](https://github.com/cosmos/cosmos-sdk/pull/12434) `x/distribution` module `SetParams` keeper method definition is now updated to return `error`.
+* (x/staking) [#12409](https://github.com/cosmos/cosmos-sdk/pull/12409) `x/staking` module `SetParams` keeper method definition is now updated to return `error`.
 * (x/crisis) [#12445](https://github.com/cosmos/cosmos-sdk/pull/12445) `x/crisis` module `SetConstantFee` keeper method definition is now updated to return `error`.
 
 ### CLI Breaking Changes