Dump all settings

similar to what I did with `ValidateLayerSettingsProvided` , add a new function via `generate_settings.py` such that it will dump all the settings set by the user

This is very helpful when people go "I don't think the settings are working", then we say "go `set VK_LAYER_DUMP_SETTINGS=1` and it will print out every setting to ensure it is what they thing it is

(would be helpful for things like https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/11010 !)

Start by reading generate_settings.py and the existing ValidateLayerSettingsProvided function to understand how generated settings are handled. Add the requested generated function and verify that enabling VK_LAYER_DUMP_SETTINGS=1 reports every setting provided by the user; the issue does not name a test or additional file to run.

Written by the indexing model from the issue text.