MINOR: Fix use_transactions_v2 usage in e2e

[mingyen066]

The use_transaction_v2 should be passed to controller node in isolated
controller. Otherwise, the transaction v2 won't be enabled.

Reviewers: Justine Olshan jolshan@confluent.io, Andrew Schofield
aschofield@confluent.io, Chia-Ping Tsai chia7712@gmail.com

[chia7712]

Here is the output (TransactionalMessageCopier) from the command:

TC_PATHS="tests/kafkatest/tests/core/transactions_test.py::TransactionsTest.test_transactions" \
_DUCKTAPE_OPTIONS='--parameters '\''{"failure_mode":"hard_bounce","bounce_target":"brokers","check_order":"True","use_group_metadata":"True","metadata_quorum":"ISOLATED_KRAFT","group_protocol":"classic","use_transactions_v2":"True"}'\'  \
/bin/bash tests/docker/run_tests.sh

before

[2025-12-20 04:14:05,065] DEBUG [Producer clientId=producer-copier-0, transactionalId=copier-0] Updating isTV2 enabled to false with FinalizedFeaturesEpoch 353 (org.apache.kafka.clients.producer.internals.TransactionManager)

after

[2025-12-19 18:00:57,151] DEBUG [Producer clientId=producer-copier-0, transactionalId=copier-0] Updating isTV2 enabled to true with FinalizedFeaturesEpoch 286 (org.apache.kafka.clients.producer.internals.TransactionManager)

[chia7712]

I ran the transactions_upgrade_test.py and transactions_test.py with this patch and the fix from #21176, and they all passed