lang/spidermonkey102: update to 102.15.1 and pass maintainership to the gecko@ team

[duchateau.olivier_gmail.com]

Summary

As spidermonkey ports are based on firefox-esr, it is better to pass maintainership to the gecko@ team. They know when there is an update.

• Update lang/spidermonkey102 to 102.15.1
• Add lang/spidermonkey115 (for the upcoming sysutils/polkit, and lang/gjs >= 1.78.0)

Note: As I run GNOME 45, I switched to lang/gjs 1.78.1

[duchateau.olivier_gmail.com]

Update lang/spidermonkey115 to 115.6.0

This new port is required for sysutils/polkit >= 124

[duchateau.olivier_gmail.com]

• lang/spidermonkey115 update to 115.7.0
• lang/spidermonkey102 adjust versions for rust ports