Fix fungibles API

[JuaniRios]

What?

• The fungibles API should return the universally recognized Location of an asset, and not where its stored locally.
  For example, if a parachain holds DOT in their assets pallet, the fungibles API should return the id of DOT as (parents: 1, interior: Here), and not the internal location of the assets pallet.

• For this we should change the id used for foreign assets to be this universal id, and not a u32.

Why?

• Wallets will start using this API, and it needs to behave as expected.
• We want to use this API when writing multichain chopsticks e2e tests.

Testing?

In the intergration tests

[JuaniRios]

• Funding Rounds Simplification #436
• WETH integration test #432
• Chopsticks integration tests #430
• AssetId Storage Migration #434
• Fix fungibles API #433 👈 (View in Graphite)
• WETH Oracle support #429
• WETH from AssetHub support #427
• 🔧 Set round end block to None on evaluation fail #426
• ✅ ETH Compatibility Tests #425
• 🚬 Ethereum compatibility #420
• main

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[graphite-app]

Graphite Automations

"Auto-assign PRs to author" took an action on this PR • (01/06/25)

1 assignee was added to this PR based on Juan Ignacio Rios's automation.

[lrazovic]

LGTM - I leave a deeper XCM config review to @vstam1

[JuaniRios]

Merge activity

• Jan 16, 7:09 AM EST: A user started a stack merge that includes this pull request via Graphite.
• Jan 16, 7:18 AM EST: Graphite couldn't merge this pull request because a downstack PR WETH from AssetHub support #427 failed to merge.
• Jan 16, 7:30 AM EST: A user started a stack merge that includes this pull request via Graphite.
• Jan 16, 7:32 AM EST: Graphite rebased this pull request as part of a merge.
• Jan 16, 7:33 AM EST: A user merged this pull request with Graphite.