Add Values to enum definitions. (#1228)

## What changes are proposed in this pull request?

Add a new function `Value` to all enums to list all the possible enum
values.

## How is this tested?

Code generated.

Author: renaudhartert-db

.github/workflows/tagging.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
       - name: Generate GitHub App Token
         id: generate-token
-        uses: actions/create-github-app-token@v1
+        uses: actions/create-github-app-token@v2
         with:
           app-id: ${{ secrets.DECO_SDK_TAGGING_APP_ID }}
           private-key: ${{ secrets.DECO_SDK_TAGGING_PRIVATE_KEY }}
@@ -49,4 +49,3 @@ jobs:
           GITHUB_REPOSITORY: ${{ github.repository }}
         run: |
           python tagging.py
-

NEXT_CHANGELOG.md

@@ -4,6 +4,9 @@
 
 ### New Features and Improvements
 
+- Enums now have a `Values` function that returns the list of all possible
+  enum values ([PR #1228](https://github.com/databricks/databricks-sdk-go/pull/1228))
+
 ### Bug Fixes
 
 ### Documentation