fix js delayed bug for load event

Nobody has claimed this yet.

i notice that you replace `DOMContentLoaded` with `DOMContentLiteSpeedLoaded`
but not for `load` event
so some codes not runnig that depend on "load" event
i check and see that you try to fix this issue but it's commented for now:

i try this code and it's fix the problem
```php
/**
* fix delay js load bug for "load" events
*/
add_filter( 'litespeed_optm_cssjs', function ( $con, $file_type, $src ) {
if ( $file_type === 'js' ) {
$con = str_replace( 'addEventListener("load"', 'addEventListener("DOMContentLiteSpeedLoaded"', $con );
}

return trim( $con );
}, 9999, 3 );
```

**Update:**
i know that `load` and `DOMContentLoaded` has small difference in logic but in case we want to delay load all js it is not matter to use `DOMContentLoaded` instead of `load` event. so replace it with `DOMContentLiteSpeedLoaded` does not make a problem (i think). in my test everything is works fine

The issue points to the litespeed_optm_cssjs filter and delayed JavaScript handling; start by locating that filter and the commented load-event replacement. Reproduce a script that depends on the load event, then verify the delayed script receives the intended event without breaking the existing DOMContentLiteSpeedLoaded behavior.

Written by the indexing model from the issue text.