[ 8° ] - Release/v2.1.0 dpp helm template: Refactor dpp helm template

[saudkhan116]

Why we create this PR?

Added some checks to the dpp helm template:

• added readOnlyRootFilesystem to the container security context
• Updated helm template to provide security context values from the helm vaules file

What is new?

Added

• added readOnlyRootFilesystem to the container security context

Updated

• Updated helm template to provide security context values from helm vaules file

[matbmoser]

I runned the IP checks and there is no problem :) free to merge