Migrate PHP extensions from PECL to Ubuntu packages

[enoch85]

Replace PECL-based installation of redis, igbinary, and smbclient with native Ubuntu packages for easier maintenance and better stability.

Changes:

• Replace PECL redis with php8.3-redis (5.3.7+4.3.0)
• Replace PECL igbinary with php8.3-igbinary (3.2.13)
• Replace PECL smbclient with php8.3-smbclient (1.0.6)
• Remove build dependencies (php-dev, libsmbclient-dev)
• Add migration logic in update script for existing installations
• Simplify installation code (remove manual .ini creation)

Benefits:

• Automatic updates via apt
• No build failures
• Faster installation (no compilation)
• Automatic security updates from Ubuntu Security Team
• Reduced code complexity (-109 lines, 87% reduction)
• Save ~50MB disk space (no build dependencies)

The update script handles migration from PECL to OS packages automatically for existing installations while maintaining backward compatibility.

Fixes: Simplifies maintenance and improves reliability