Feature: Support for custom schema for deployment template

[kamal-devtron]

🔖 Feature description

Support for custom schema for deployment template

🎤 Pitch / Usecases

As of now, we have pre-defined values for the deployment template which is available in GUI, and want to add some custom value so need support for custom schema json which will allow us to use our own per defined values.

🔄️ Alternative

No response

👀 Have you spent some time to check if this issue has been raised before?

• [X] I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• [X] I have read the Code of Conduct

AB#9595