[Feature] Enable option to add Volume, VolumeMount to devlake Deployment- critical for SSL certificate

[GuillermoGarciaF]

The devlake Deployment does not expose Volumes, VolumeMounts.

These are required e.g. to mount a CA Certificate to establish a secure SSL connection.
Our policies only allow SSL connections to Azure MySQL Server. I would love to contribute to Apache DevLAke and add the PR myself.

There are several GH issues related to SSL and the current limitations

• [Question][DevOps] Deploy devlake with managed GCP Cloud database service (with SSL enabled) incubator-devlake#7928
• Azure MySQL flexible server integration with ApacheDevlake helm chart incubator-devlake#8121

[GuillermoGarciaF]

I create a proposed implementation which is very simple and only modifies a few lines of code in the devlake chart
See #311

[GuillermoGarciaF]

Closed by above PR