Fix compatibility with php 8.4 and newer ImageMagick library versions

[michalananapps]

• Fix skewness and kurtosis test after 7.1.1-24 calculation method change
• declare MAGICK_LIB_VERSION_GTE macro to help preprocessor code filtering
• replace php_strtolower wtih zend_str_tolower method calls due to deprecation in 8.4

[michalananapps]

@Danack Check this, please :)

[tianon]

(see also #690, which this has overlap with)

[MacGritsch]

Patch works fine for PHP 8.4 installed by homebrew on macOS (ARM).

[Fabccc]

I have some problems when installing the patch with php-ext-installer, her's the result:

> [stage-2 6/9] RUN install-php-extensions gd soap zip pdo pdo_mysql intl pcntl opcache redis apcu gnupg amqp xdebug https://codeload.github.com/michalananapps/imagick/tar.gz/refs/heads/test:
190.9 PHP-Parser-5.0.0/phpstan.neon.dist
190.9 Saved /tmp/pear/temp/imagick/ImagickKernel_arginfo.h
190.9 Saved /tmp/pear/temp/imagick/ImagickPixel_arginfo.h
190.9 Saved /tmp/pear/temp/imagick/ImagickDraw_arginfo.h
190.9 In /tmp/pear/temp/imagick/Imagick.stub.php:
190.9 Imagick::newImage(): Parameter format has null default, but is not nullable
190.9 make: *** [Makefile:191: /tmp/pear/temp/imagick/Imagick_arginfo.h] Error 1
190.9 make: *** Waiting for unfinished jobs....
190.9 Installing header files:          /tmp/pear/temp/pear-build-defaultuserfkfl889oear21Ro6rRH/install-imagick-3.7.0/usr/local/include/php/
190.9 ERROR: `make -j4 INSTALL_ROOT="/tmp/pear/temp/pear-build-defaultuserfkfl889oear21Ro6rRH/install-imagick-3.7.0" install' failed
------
_Dockerfile.temp:44
--------------------
  42 |     RUN sed -i '/disable ghostscript format types/,+6d' /etc/ImageMagick-6/policy.xml
  43 |     
  44 | >>> RUN install-php-extensions  https://codeload.github.com/michalananapps/imagick/tar.gz/refs/heads/test
  45 |     
  46 |     # --------------------------------------------------- Scripts ------------------
--------------------

[michalananapps]

@Fabccc This PR originates from the master branch, which clearly hasn't been updated in a long time. I've prepared a fix based on the develop branch: develop-php8.4-patch. The PR is available here: #704. Try that patch - it should work.

[Fabccc]

@michalananapps Hi!
Thanks for the quick reply, I tried it and it works like charm ! thank you !