feat: added `debug` flag in the SuperTokenConfig logging

Summary of change

Added debug flag in the SuperTokenConfig in the init() for logging

Added unit tests

(If relevant, please create a PR in our docs repo, or create a checklist here highlighting the necessary changes)

[x] Changelog has been updated
[ ] coreDriverInterfaceSupported.json file has been updated (if needed)
- Along with the associated array in supertokens/constants.go
[ ] frontendDriverInterfaceSupported.json file has been updated (if needed)
[x] Changes to the version if needed
- In supertokens/constants.go > version variable
[x] Had installed and ran the pre-commit hook
[ ] If new thirdparty provider is added,
- [ ] update switch statement in recipe/thirdparty/providers/config_utils.go file, createProvider function.
- [ ] add an icon on the user management dashboard.
[x] Issue this PR against the latest non released version branch.
- To know which one it is, run find the latest released tag (git tag) in the format vX.Y.Z, and then find the latest branch (git branch --all) whose X.Y is greater than the latest released tag.
- If no such branch exists, then create one from the latest released branch.
[ ] If access token structure has changed
- Modified test in session/accessTokenVersions_test.go to account for any new claims that are optional or omitted by the core