feat: add multi-container support with shared templates

[Luv7804]

Fixes Issue

• Closes Provide Multi-Container Support for Services and Workers in polymorphic-app chart #138

Changes proposed

• Provided Multi-container pods function correctly for both services and workers
• Created template for mutiple container and used it in both services and workers.
• Provided all three types of healthchecks in worker.

Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• My change requires changes to the documentation.
• I have updated the documentation accordingly.
• All new and existing tests passed.
• This PR does not contain plagiarized content.
• The title of my pull request is a short description of the requested changes.