[FLINK-33300] Upgrade testcontainers from 1.18.3 to 1.19.1

[snuyanzin]

What is the purpose of the change

The PR to upgrade testcontainers to 1.19.1

Brief change log

pom.xml

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

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

• Dependencies (does it add or upgrade a dependency): (yes )
• 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)

Documentation

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

[flinkbot]

CI report:

• 2ed3e3b Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

• @flinkbot run azure re-run the last Azure build

[RyanSkraba]

Hello! I've run a couple of the tests using this, and this doesn't seem to cause any problems. Thanks!

[snuyanzin]

thanks for taking a look