feat: Convert Swaps test from mocha to jest (#25297)

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## **Description**

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This PR converts `app/scripts/controllers/swaps.test.js` from mocha to
jest. In particular, replaces instances of `assert` with `expect`, and
removes `sinon` and uses `jest`'s mocking capabilities in its place. The
`jest.config.js` was updated to include
`app/scripts/controllers/swaps.test.js` in the `testMatch` array. The
`.mocharc.js` was updated to ignore the test.

## **Related issues**

Fixes: #19355

## **Manual testing steps**

1. Running `yarn jest -- app/scripts/controllers/swaps.test.js` and
seeing all tests pass
2. Running `yarn test:unit:mocha` and not seeing the metametrics tests
run.

## **Screenshots/Recordings**

Not applicable

## **Pre-merge author checklist**

- [x] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask
Extension Coding
Standards](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/CODING_GUIDELINES.md).
- [x] I've completed the PR template to the best of my ability
- [x] I’ve included tests if applicable
- [x] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.

.eslintrc.js

@@ -269,6 +269,7 @@ module.exports = {
       excludedFiles: [
         'app/scripts/controllers/app-state.test.js',
         'app/scripts/controllers/mmi-controller.test.js',
+        'app/scripts/controllers/swaps.test.js',
         'app/scripts/controllers/metametrics.test.js',
         'app/scripts/controllers/permissions/**/*.test.js',
         'app/scripts/controllers/preferences.test.js',
@@ -301,6 +302,7 @@ module.exports = {
         '**/__snapshots__/*.snap',
         'app/scripts/controllers/app-state.test.js',
         'app/scripts/controllers/mmi-controller.test.ts',
+        'app/scripts/controllers/swaps.test.js',
         'app/scripts/controllers/metametrics.test.js',
         'app/scripts/controllers/permissions/**/*.test.js',
         'app/scripts/controllers/preferences.test.js',

.mocharc.js

@@ -8,6 +8,7 @@ module.exports = {
     './app/scripts/controllers/app-state.test.js',
     './app/scripts/controllers/permissions/**/*.test.js',
     './app/scripts/controllers/mmi-controller.test.ts',
+    './app/scripts/controllers/swaps.test.js',
     './app/scripts/controllers/metametrics.test.js',
     './app/scripts/controllers/preferences.test.js',
     './app/scripts/constants/error-utils.test.js',