test(plutus): add Plutus V3 array builtin E2E tests

[Unisay]

Context

What is the goal of this PR?
Add end-to-end tests for three new Plutus V3 array manipulation builtins (indexArray, lengthOfArray, and listToArray) that were introduced in protocol version 11.

Why is this change necessary?
These builtins are part of the batch6 enhancements for Plutus V3, enabling more efficient array operations in smart contracts. Without E2E tests, we cannot verify that these builtins work correctly in a real on-chain environment with cardano-node.

Approach

This PR follows the existing Plutus V3 testing pattern:

• Adds three new minting policy scripts to tests/data/plutus/v3/batch6/1.1.0/
• Each script exercises one of the new array builtins
• Scripts are compiled with Plinth/PlutusTx and serialized to CBOR format
• Scripts are registered in the batch6 test suite via plutus_common.py
• Tests run through the existing batch6 test infrastructure, which executes minting transactions and verifies successful on-chain execution

The scripts use a succeeding (positive test) approach - they demonstrate that the builtins execute without errors when called with valid inputs.

Changes

Array Builtin Test Scripts

• succeedingIndexArrayPolicyScript_V3_110.plutus: Tests indexArray builtin for accessing array elements by index
• succeedingLengthOfArrayPolicyScript_V3_110.plutus: Tests lengthOfArray builtin for determining array size
• succeedingListToArrayPolicyScript_V3_110.plutus: Tests listToArray builtin for converting lists to arrays

Test Registration

• plutus_common.py:490-492: Added three new scripts to SUCCEEDING_BATCH6_SCRIPT_FILES_V3 tuple, integrating them with the existing batch6 test suite