Pipeline E2E compatible with com.mysql:mysql-connector-j:8.0

[sandynz]

Related to #28849.

After discussing with @RaigorJiang , there're 2 workarounds. Use statement.execute and then getResultSet is an easier way, so it's used for now.

Changes proposed in this pull request:

• Pipeline E2E use statement.execute and getResultSet to compatible with com.mysql:mysql-connector-j:8.0 for extended DistSQL
• Revert pipeline E2E compatibility code of com.mysql:mysql-connector-j:8.0

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