meson-introspect: do not include host environment in test/benchmark introspection
meson-introspect: do not include host environment in test/benchmark introspection

The host environment could change between the time "meson setup"
produces intro-tests.json, and the time "meson test" is run.
Including it only adds clutter to the introspection data.

Signed-off-by: Paolo Bonzini <69d3ebcf5ee4e7f05a50dc23cd96655b730804b4@redhat.com>

jpakkane/meson,jpakkane/meson,QuLogic/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,QuLogic/meson,mesonbuild/meson,jpakkane/meson,becm/meson,QuLogic/meson,jpakkane/meson,mesonbuild/meson,becm/meson,mesonbuild/meson,mesonbuild/meson,becm/meson,pexip/meson,mesonbuild/meson,pexip/meson,pexip/meson,QuLogic/meson,becm/meson,QuLogic/meson,becm/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,mesonbuild/meson,jpakkane/meson,becm/meson,becm/meson,pexip/meson,pexip/meson,becm/meson,pexip/meson,pexip/meson,QuLogic/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,becm/meson,jpakkane/meson,mesonbuild/meson,jpakkane/meson,becm/meson,QuLogic/meson,QuLogic/meson