[4.0] Split up installer plugin JS

[SharkyKZ]

Fixes #30017

Summary of Changes

Moves installer plugin JS to separate files for each plugin.
Fixes markup generating empty tabset.
Moves plugin-specific language strings to plugins.

Testing Instructions

node build.js --compile-js required.

1. Test that all extension install methods still work.
2. Disable all installer plugins. Go to extension installer.

Actual result BEFORE applying this Pull Request

2. JS errors:

Uncaught TypeError: document.getElementById(...) is null --- media/com_installer/js/installer.min.js
Uncaught TypeError: i[0] is undefined --- media/vendor/joomla-custom-elements/js/joomla-tab.min.js

Expected result AFTER applying this Pull Request

1. Works like before.
2. No JS errors.

Documentation Changes Required

IDK.

[david0296]

I have tested this item ✅ successfully on 080e1ef

After applying this PR and running the command, the installer plugins still work and there are no more JS errors

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/30162.}

[jmeintrup]

I have tested this item ✅ successfully on 080e1ef

Prepatch: Browser Console outputs errors as described
Postpatch: No Errors in Console

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/30162.}