Snowbridge V2: create new exporter for container native tokens

[Agusrodri]

Description

This PR introduces the new ContainerEthereumBlobExporterV2.

This new struct takes care of processing incoming ExportMessage instructions that comes from container chains via Snowbridge V2, with the goal of transferring native container tokens from the corresponding container to Ethereum.

XCM V5 Features

• Detects and processes AliasOrigin instruction to identify V2 messages.
• Supports new PayFees instruction for explicit fee payment.
• Validates WithdrawAsset + PayFees pattern for fee handling.

V1 compatibility

• Distinguishes between V1 and V2 messages based on presence of AliasOrigin instruction.
• Returns NotApplicable for V1 messages, allowing fallback to V1 exporter.

New XCM message structure (inside ExportMessage instruction)

For this new exporter to take action, the following message structure is required:

   WithdrawAsset         // Reserve fee asset
   PayFees               // Specify fee to pay
   ReserveAssetDeposited // The actual token being bridged
   [ClearOrigin]         // Optional
   AliasOrigin           // V2 identifier - sets the origin
   DepositAsset          // Deposit to AccountKey20 beneficiary
   SetTopic              // Message ID

[github-actions]

Coverage Report

(master)

@@                      Coverage Diff                      @@
##           master   agustin-outbound-queue-v2      +/-   ##
=============================================================
+ Coverage   71.04%                      71.75%   +0.71%     
+ Files         550                         554       +4     
+ Lines       75240                       77429    +2189     
=============================================================
+ Hits        53451                       55559    +2108     
+ Misses      21789                       21870      +81     

Files Changed	Coverage
/chains/container-chains/runtime-templates/frontier/src/weights/pallet_xcm.rs	3.09% (+3.09%)	✅
/chains/container-chains/runtime-templates/frontier/src/weights/xcm/mod.rs	37.55% (+17.45%)	✅
/chains/container-chains/runtime-templates/simple/src/weights/pallet_xcm.rs	3.09% (+3.09%)	✅
/chains/container-chains/runtime-templates/simple/src/weights/xcm/mod.rs	36.36% (+17.80%)	✅
/primitives/xcm-commons/src/lib.rs	92.68% (+1.50%)	✅

Coverage generated