Add multicall contract address for X Layer

[venables]

Adds the multicall3 contract address for X Layer mainnet, which is: https://www.okx.com/web3/explorer/xlayer/address/0xcA11bde05977b3631167028862bE2a173976CA11

Documented in the multicall3 deployments.json file:
https://github.com/mds1/multicall/blob/main/deployments.json#L1147-L1151

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PR-Codex overview

The focus of this PR is to add a multicall to the X Layer chain.

Detailed summary

• Added multicall functionality to the X Layer chain in xLayer.ts
• Added multicall3 contract with address and blockCreated details

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Latest commit: 6a78dc4

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