fix: TLS for mongo without sharding

[aneojgurhem]

Motivation

Allow ArmoniK.Core version 0.30.0 to connect to mongodb (not sharded) with TLS.

Description

Add an extra namespace in the Helm Chart. It then produces certificates with the dns we use to connect to mongodb. It allows to connect with TLS without issues.

Testing

• Test on local and AWS deployment were performed with ArmoniK, this version of the infrastructure and ArmoniK.Core version 0.30.0. Bench execution passes without issues.

Impact

Allow to use regular mongodb with the new core version.

Checklist

• My code adheres to the coding and style guidelines of the project.
• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• I have thoroughly tested my modifications and added tests when necessary.
• Tests pass locally and in the CI.
• I have assessed the performance impact of my modifications.