add command to openldap container

[davidfrickert]

this command ensures non-first openldap containers dont try to init already initialized cluster-wide resources, such as the root DN or ppolicy module.

• more detail: https://github.com/jp-gouin/helm-openldap/issues/148#issuecomment-2338435733

What this PR does / why we need it:

Pre-submission checklist:

• [x] Did you explain what problem does this PR solve? Or what new features have been added?
• [ ] Have you updated the readme?
• [x] Is this PR backward compatible? If it is not backward compatible, please discuss open a ticket first

[davidfrickert]

potentially fixes #148

the list of env vars that are removed is non exhaustive, maybe more need to be added, these are just the ones that were causing problems in my setup

[jp-gouin]

Hi @davidfrickert , The CI has been fixed in main, can you sync your PR ?

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