build: add all value to tools option

This allows the installation of all the client tools by just adding the
all value in the tools option like this: -Dtools=all

Default value set to "terminal"

Signed-off-by: Pablo Saavedra <psaavedra@igalia.com>
3 jobs for tools_all in 3 minutes and 18 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Container Prep
passed container_prep #1714794

00:01:28

 
  Build
passed build-native-meson-default-options #1714795

00:01:50

passed build-native-meson-no-gl-renderer #1714796

00:00:34