archivers/php-zstd: Update 0.14.0 => 0.15.2

Most notably, this update adds new steaming APIs and
dictionary support.

Changelogs:
* https://github.com/kjdev/php-ext-zstd/releases/tag/0.15.2
* https://github.com/kjdev/php-ext-zstd/releases/tag/0.15.1
* https://github.com/kjdev/php-ext-zstd/releases/tag/0.15.0

Commit log:
* https://github.com/kjdev/php-ext-zstd/compare/0.14.0...0.15.2

* Removed php85 fix, which isn't needed anymore

PR:	  	288874
Approved by:	yuri@ (Mentor)