feat: add chiliz pricing support

[bizk]

Explanation

• adds Chiliz mapping
• Fixes multicall smart contract address

References

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 communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Low Risk
Low risk constant/config change that only expands supported chain/asset mappings for price lookups; impact is limited to CHZ pricing on the added chain ID if the mapping is incorrect.

Overview
Adds Chiliz Mainnet native asset support to the token price service by mapping chain ID 0x15b38 to the CAIP-19 identifier for CHZ in SPOT_PRICES_SUPPORT_INFO.

Updates the assets-controllers changelog to document the new CHZ mapping.

^{Written by Cursor Bugbot for commit 2c45fdd. This will update automatically on new commits. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

[gabrieledm]

LGTM

[mikesposito]

True that we added an object property, but what we are doing from the perspective of a package consumer is changing the SPOT_PRICES_SUPPORT_INFO exported variable. Should this line go under the CHANGED category?

[mikesposito]

hmm actually, the constant I was referring to doesn't seem to be exported by the package, so in theory this change is transparent to consumers

[mcmire]

True. What effect does this have on the service class? Were there errors in attempting to use this chain before? Does it change the return type of something? etc.

[mcmire]

Similar to my comment in #7688 (comment), what do you think about this?

Suggested change

	- Add CHZ (0x15b38) mapping to eip155:88888/erc20:0x677f7e16c7dd57be1d4c8ad1244883214953dc47 ([#7794](https://github.com/MetaMask/core/pull/7794))
	- `CodefiTokenPricesServiceV2` now supports fetching prices of CHZ on Chiliz Mainnet (chain `0xdef1`) ([#7794](https://github.com/MetaMask/core/pull/7794))