chore: Temporarily disable @typescript-eslint/naming-convention (#7151)

## Explanation

The rule `@typescript-eslint/naming-convention` was already disabled for
most files, but it was set to `warn` in a few places still. It's now
completely disabled instead.

This was done to reduce the set of changes that are part of the upcoming
switch to error suppression (#6790), and also for consistency. We still
want to use this rule, but we can gradually begin enforcing it in a more
controlled manner using error suppression, across the entire repository
at once rather than selectively.

## References

Relates to #6790

These changes were extracted from the draft PR #7148

## Checklist

- [x] I've updated the test suite for new or updated code as appropriate
- [x] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [x] I've communicated my changes to consumers by [updating changelogs
for packages I've
changed](https://github.com/MetaMask/core/tree/main/docs/contributing.md#updating-changelogs),
highlighting breaking changes as necessary
- [x] I've prepared draft pull requests for clients and consumer
packages to resolve any breaking changes

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Disables `@typescript-eslint/naming-convention` everywhere and removes
related thresholds/config and an inline disable comment.
> 
> - **ESLint config**
> - Remove `@typescript-eslint/naming-convention: 'warn'` from
`**/*.d.ts` and `packages/eth-block-tracker/**/*.ts` overrides in
`eslint.config.mjs`.
> - **Warning thresholds**
> - Delete thresholds for
`packages/eth-block-tracker/tests/buildDeferred.ts` and remove
`@typescript-eslint/naming-convention` entry from
`tests/setupAfterEnv.ts` in `eslint-warning-thresholds.json`.
> - **Types**
> - Drop inline disable for `@typescript-eslint/naming-convention` in
`types/global.d.ts` comment.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
4bc7432. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: Gudahtt

eslint-warning-thresholds.json

@@ -101,15 +101,11 @@
     "@typescript-eslint/unbound-method": 5,
     "no-restricted-syntax": 28
   },
-  "packages/eth-block-tracker/tests/buildDeferred.ts": {
-    "@typescript-eslint/naming-convention": 1
-  },
   "packages/eth-block-tracker/tests/recordCallsToSetTimeout.ts": {
     "@typescript-eslint/no-explicit-any": 1
   },
   "packages/eth-block-tracker/tests/setupAfterEnv.ts": {
     "@typescript-eslint/consistent-type-definitions": 1,
-    "@typescript-eslint/naming-convention": 1,
     "@typescript-eslint/no-explicit-any": 3
   },
   "packages/eth-block-tracker/tests/withBlockTracker.ts": {

eslint.config.mjs

@@ -188,7 +188,6 @@ const config = createConfig([
   {
     files: ['**/*.d.ts'],
     rules: {
-      '@typescript-eslint/naming-convention': 'warn',
       'import-x/unambiguous': 'off',
     },
   },
@@ -224,7 +223,6 @@ const config = createConfig([
       // TODO: Re-enable these rules or add inline ignores for warranted cases
       '@typescript-eslint/prefer-nullish-coalescing': 'warn',
       'no-restricted-syntax': 'warn',
-      '@typescript-eslint/naming-convention': 'warn',
       '@typescript-eslint/no-explicit-any': 'warn',
       '@typescript-eslint/unbound-method': 'warn',
       '@typescript-eslint/consistent-type-definitions': 'warn',

types/global.d.ts

@@ -5,7 +5,7 @@ declare global {
     // We're using `interface` here so that we can extend and not override it.
     // In addition, we must use the generic parameter name `R` to match the
     // Jest types.
-    // eslint-disable-next-line @typescript-eslint/consistent-type-definitions,@typescript-eslint/naming-convention
+    // eslint-disable-next-line @typescript-eslint/consistent-type-definitions
     interface Matchers<R> {
       toBeFulfilled(): Promise<R>;
       toNeverResolve(): Promise<R>;