[infrastructure] [macos] use QGIS-Mac-Packager dependencies to setup MacOS CI build with GitHub workflows. Use CMake's define QGIS_MAC_DEPS_DIR to define folder to dependencies
This PR adds (optional) synchronization of the master password
with the OS password manager (AKA wallet/keychain).
A set of new menu items has been added in the options ->
authentication -> utilities to manage the new behavior.
Notifications are handled by the message bar unless the
password r/w operation is triggered from a modal dialog,
in this case the notifications will be routed through
the recently exposed QgisApp::showSystemNotification
that uses the OS tray notifications.
This new feature requires libqt5keychain, and was tested
with v. 0.5+
