InputAccordion duplicate elem_id handling

[w-e-w]

Description

this implements handling of duplicate element IDs for InputAccordion

• this PR is a supplement too Fix postprocessing_enable_in_main_ui ScriptPostprocessing elem_id #16373

for more details about this issue read #16373

this PR makes InputAccordion function correctly if the issue described in #16373 were to occur, this would also forcibly modify the element ID by app ending a number
if an extension actually relies on the element ID for a specific use case for example inside JavaScript then the JavaScript will still not function
so this is just a "increase compatibility" but not a fix

extension should not rely on this
the real fixed requires manual modification with the use of #16373

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with this PR
InputAccordion now tracks all previously used InputAccordion elem_id and if if it input ID is found to be a duplicate then it append a number at the end of the input id

a on_script_unloaded callback is added to clear / reset the accordion_id_set and global_index

the callback is registered here inside the init amd mpt oput side is becaluse ui_components, happens too early before callbacks can be registered
well if I really want to I can register the call back some other place in the script
but I feel like registering it somewhere else introduces more spaghetti in the code so I decided to put everything inside the class itself

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests

[w-e-w]

@light-and-ray I added I've implemented the auto resolving of duplicate elem_id for InputAccordion