[CherryPick] Update dab.draft.schema.json (#1782) (#1837)

Cherry pick #1782  to 0.9 branch.


## Why make this change?

- Currently our config and schema file had some differences, which is
why even the config we support was showing to contain errors.

## What is this change?
- updating schema to reflect the correct supported config file.

## How was this tested?

- Online Tool: https://www.jsonschemavalidator.net/

## Screenshots

### Before


![image](https://github.com/Azure/data-api-builder/assets/102276754/77664442-ba43-4e75-ad79-728a51686b10)


### After


![image](https://github.com/Azure/data-api-builder/assets/102276754/ff1c2873-fddc-4340-ac06-7aa90ac636cc)

---------

## Why make this change?

- Reference associated issue using `#` syntax. e.g. Closes #XX
- Include summary (1-2 sentences) of linked issue to avoid redirecting
reviewers to different pages.
- Include links to any additional discussion threads related to this
change.

## What is this change?

- Summary of how your changes work to give reviewers context of your
intent.
  - Links to relevant documentation / StackOverflow, if applicable.

## How was this tested?

- [ ] Integration Tests
- [ ] Unit Tests

## Sample Request(s)

- Example REST and/or GraphQL request to demonstrate modifications
- Example of CLI usage to demonstrate modifications

Co-authored-by: Abhishek  Kumar <[email protected]>
Co-authored-by: Aniruddh Munde <[email protected]>

Author: 3 people

schemas/dab.draft.schema.json

@@ -320,6 +320,11 @@
                       "required": [
                         "methods"
                       ]
+                    },
+                    {
+                      "required": [
+                        "enabled"
+                      ]
                     }
                   ]
                 }
@@ -359,6 +364,11 @@
                       "required": [
                         "operation"
                       ]
+                    },
+                    {
+                      "required": [
+                        "enabled"
+                      ]
                     }
                   ]
                 }