[6.1] Remove use of deprecated dispatcher from the plugin constructor

[heelc29]

Summary of Changes

Same as #45644 for new plugin (captcha/powcaptcha) of Joomla 6.1

Testing Instructions

Enable Log Deprecated API

Select Default Captcha

Open view to remind username (or reset passwort) eg. /index.php/component/users/remind

Check log file administrator\logs\deprecated.php

Actual result BEFORE applying this Pull Request

Log message
deprecated Passing an instance of Joomla\Event\DispatcherInterface to Joomla\CMS\Plugin\CMSPlugin::__construct() will not be supported in 7.0. Starting from 7.0 CMSPlugin class will no longer implement DispatcherAwareInterface. - [ROOT]\libraries\src\Plugin\CMSPlugin.php - Line 134

Expected result AFTER applying this Pull Request

No log message

Link to documentations

Please select:

• No documentation changes for docs.joomla.org needed
• No documentation changes for manual.joomla.org needed

[tecpromotion]

I have tested this item ✅ successfully on 0f61fbf

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46683.}

[HLeithner]

thanks