Add trigger events onBeforeRespond and onAfterRespond during redirection

[csthomas]

Summary of Changes

Add missing triggers before and after send redirection headers.

Testing Instructions

Code review.

Expected result

The onBeforeRespond and onAfterRespond events should be triggered during redirection in the same way that they are triggered when delivering the page.

Actual result

The onBeforeRespond and onAfterRespond events are not triggered during redirection.

[Fedik]

I have tested this item ✅ successfully on 881054f

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[Fedik]

is it will go to Joomla4 ?

[csthomas]

First, this PR must be tested by one more person.

[Quy]

I have tested this item ✅ successfully on 881054f

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[Quy]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/20677.}