Changes

feat(pingcap/tidb): adjust next-gen ci jobs (#3704)

This pull request updates the integration test pipelines for TiDB to
improve test coverage and update the scripts used for testing. The main
changes involve adding version checks, updating the test script used,
and enabling a previously commented-out test scenario.

**Test script and test coverage improvements:**

* The integration E2E test pipeline now runs `./run-tests-next-gen.sh`
instead of the previous test script, ensuring the latest test logic is
used.
* The real cluster integration test pipeline enables the scenario
`tests/integrationtest/run-tests-next-gen.sh -s bin/tidb-server -d y`,
which was previously commented out, to expand test coverage.

**Build and environment enhancements:**

* The E2E test pipeline adds a check for the version of `tikv-worker` by
running `./tikv-worker -V`, improving visibility into the test
environment.
* The environment variable `MINIO_BIN_PATH` is now set to `"bin/minio"`
for the E2E test pipeline, preparing the environment for tests that may
require MinIO.
 (commit: 29af7b1)