systemd: ship pcrphase/measure tools and units in systemd-extra-utils

New tooling related to signed TPM policies introduced in v252

Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>