Also deprecate GALLIUM_PROCESSS_NAME in favor of MESA_PROCESS_NAME, while maintaining existing functionality for use cases relying on GALLIUM_PROCESSS_NAME. GALLIUM_PROCESSS_NAME takes higher precedence over MESA_PROCESS_NAME in the case where both are set. Signed-off-by: Ryan Neph <ryanneph@google.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20779>