net/asterisk-chan_sccp: Update 4.3.3 => 4.3.5.20231205 (4.3.5 with several patches after release)

Changelogs:
https://github.com/chan-sccp/chan-sccp/releases/tag/v4.3.4
https://github.com/chan-sccp/chan-sccp/releases/tag/v4.3.5
https://github.com/chan-sccp/chan-sccp/compare/v4.3.5...2e21051

Improve port:

• Add flavors asterisk20 and asterisk22.
• Set default flavor to asterisk22.
• Fix dependencies.
• Fix warnings from portclippy.
• Parameterize CONFLICTS_INSTALL.

PR: 288423
Approved by: Diederik de Groot <ddegroot@talon.nl> (maintainer, timeout 2 weeks)