Support multi-document transactions on the MongoDB image

[mervyn-mccreight]

According to the documentation in the testcontainers-java equivalent multi-document transactions are only supported for a replica-set.

To support this we need to Initialize a single replica set after container-start up and wait for the completion of the initialization.

This is useful if you want to test code that makes use of transactions, as far as I know it does not work otherwise.

[thomaseizinger]

Is it possible to do this via a client - outside of testcontainers - once the container is started?

[clarkmcc]

Bumping. Is this theoretically possible for testcontainers to do?

[mervyn-mccreight]

As far as I know it should be possible yes. At least using mongosh you can do it.

[thomaseizinger]

We will be removing all images from this library, see https://github.com/testcontainers/testcontainers-rs/issues/471.