[jsscripting] Upgrade openhab-js & Remove SharedCache (#13908)

[jsscripting] Upgrade openhab-js & Remove SharedCache (#13908)

Upgrades the included openhab-js version to 3.1.0, which uses the new
caches from core (introduced in
https://github.com/openhab/openhab-core/pull/2887) and provides many
doc improvements.

Removes the SharedCache from the addon because this functionality is
now provided by core (see
https://github.com/openhab/openhab-core/pull/2887).

Signed-off-by: Florian Hotze <florianh_dev@icloud.com>