backend: kv-configs-reverse to read all from kv

[vijaygupta18]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates

Description

Additional Changes

• This PR modifies the database schema (database migration added)
• This PR modifies dhall configs/environment variables

Motivation and Context

How did you test it?

Checklist

• I formatted the code and addressed linter errors ./dev/format-all-files.sh
• I reviewed submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable

[khuzema786]

{
  "enableKVForRead": ["table1", "table2", "table3", ...],
  "enableKVForWriteAlso": [{ "nameOfTable" : "table1", "percentEnable" : 100 }, ...],
  "disableForKV": ["table1", "table2", "table3", ...],
  "kvTablesTtl": {
    "table1": 3600,
    "table2": 7200,
    "table3": 14400,
     ...
  },
  "useCAC": ["table4", "table5", ...],
  "useCACForFrontend": true,
  "readFromMasterDb": ["table6", "table7", ...]
}