feat: added an `OpenLDAP` testcontainer module

[CommanderStorm]

I noticed that there currently is not LDAP testcontainer.

Similar to the go testontainer modules, I chose the bitnami/openldap containers.

Similar to https://github.com/testcontainers/testcontainers-rs-modules-community/pull/178, this PR includes the mongodb-example-fix.

[CommanderStorm]

The testcase failour seems to be because https://github.com/paupino/rust-decimal/issues/669

=> needs new rust-decimal-release

We could solve this by adding --locked to the cargo-hack command. With that flag, the PR tests were to be green

[DDtKey]

Thank you for quick changes! ❤️