Introduce alpha configuration option to enable testing of structured configuration

Cleanup method name refactors missed in comments

Streamline Provider Interface & Bearer Session Handlers

Add User & Groups to Userinfo

Use New Stable Chart URL

The existing URL no longer works. This commit updates the Chart
dependencies to use the new Stable chart URL.

This will fix the "Chart not found" errors that occur if these example
resources are used.

Please keep in mind this is only a bandaid, as the repository is still
EOL, and should not be used.

Fix basic auth legacy header conversion

Add AlphaOptions struct to prepare for alpha config loading

* Support TLS 1.3

* Set TLS 1.3 explicitly to fix gosec warning.

* Add an entry to changelog.

* Fix typo in the changelog.

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

Fix log header output

Centralize Provider authorization interface method

Validate and log provider type on startup