feat: remove nft detection polling (#4281)

## Explanation

This PR removes polling logic from NftDetectionController.
Calling detectNfts function will be tied to UI components instead of
preference change events.
NftDetectionController will now extend `BaseController` instead of
`StaticIntervalPollingController`.

The detectNfts logic has also changed to call the NFT-API and save the
nfts in state as soon as they are available instead of waiting to fetch
all the user NFTs before saving to state.


## References


* Related to
[67890](MetaMask/metamask-extension#24547)


## Changelog

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### `@metamask/assets-controllers`

- **BREAKING**: Changed NftDetectionController to extend
`BaseController`.
- **REMOVED**: Removed `interval` from contructor in
`NftDetectionController`.


## Checklist

- [ ] I've updated the test suite for new or updated code as appropriate
- [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [ ] I've highlighted breaking changes using the "BREAKING" category
above as appropriate