[DevCenter] Add 2023-10-01-preview dataplane API version (#26049)

* Adds base for updating Microsoft.DevCenter from version preview/2023-09-01-preview to version 2023-10-01-preview

* Updates readme

* Updates API version in new specs and examples

* 2023-10-01-preview updates

* Add readme changes

* Fix linting errors

* Add ValidationFailed state for customization groups

* Review updates

* Revert customizationTask `parameters` -> `inputs`. Inputs was a conscious product decision and defined in the customization task yaml schema.

* Add doc for cust group list

* Update environment PATCH to follow guidelines

* Remove headers, remove int

* Revert to "defaultValue" and "allowedValues". These are from a defined yaml schema used by private preview customers.

* Align on default/allowed/parameters after internal discussion

* Fix bool naming and descriptions

* Fix additional description

* Enum

Author: chrissmiller

custom-words.txt

@@ -595,6 +595,8 @@ customhostname
 customimages
 customimagesearch
 customizability
+customizationgroups
+customizationtasks
 customizer
 custommpi
 customermanagedkeys