[FLINK-34508][ci] Migrates S3 ITCases to Minio tests

[morazow]

What is the purpose of the change

Migrates S3 related ITCases and E2E tests to use Minio test container.

Brief change log

• Removes S3TestCredentials class from S3 related integration tests
• Adds MinioTestContainer to provide S3 credentials and filesystem initialization
• Enable test container reuse for MinioTestContainer
• Refactored JUnit4 from JUnit5 on changed classes
• TODO: Removes S3 related environment (e.g, IT_CASE_S3_*) variables

Verifying this change

• Azure CI pipelines should build successfully
• GitHub Actions should build successfully

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no
  • The test files of S3 file system changes

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? not applicable

[flinkbot]

CI report:

• 7f833c04c444d4870be16b310ce627acf16687d9 Azure: SUCCESS

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