Remove temporary `src/legacy/core_plugins/data` eslint overrides

In order to move forward with https://github.com/elastic/kibana/pull/49244 we needed to disable some rules in `src/legacy/core_plugins/data`. We need to remove the related overrides and get the package passing these rules pretty soon.

```js
// .eslintrc.js
{
  files: ['src/legacy/core_plugins/data/**/*.{js,ts,tsx}'],
  rules: {
    'react-hooks/exhaustive-deps': 'off',
  },
},
```