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)