ICSHWI-10243

Genrate a list of PVs to be archived

See merge request e3/wrappers/rf/e3-evrisland!12

ON this version is possible to have the width of the modulator associated
to the RF pulse (to be used on MEBT systems)

ICSHWI-9069

Removed almost all use of dbpf.
Remove island_* snippets (now all IOCs should use evrisland-base.iocsh)

This way is possible the set the frequency as a frequency value
(and not a selector). The read back value should be used as a referency
of the current set frequency.

These changes allow to use Mixed Mode synced with a 14Hz Pulse

New frequency events

See merge request e3/wrappers/rf/e3-evrisland!10