Make pvuaget/put output more closely match that of pvget/pvput

[JJL772]

Low priority task.

Make pvuaget and pvuaput more closely match the output of pvget and pvput.

pvget displays in the format:

PV TIMESTAMP VALUE [ALARM_SEVERITY ALARM_STATUS ALARM_TYPE]

for example:

$ pvget SYS:DEMO::CA_BEAC_TIME
SYS:DEMO::CA_BEAC_TIME 2025-01-08 10:23:03.959  15.0
$ pvget SYS:DEMO::GTIM_EVT_SRC
SYS:DEMO::GTIM_EVT_SRC 2025-01-09 01:08:37.458  "No working providers" MAJOR DEVICE READ

pvput displays:

Old : TIMESTAMP VALUE
New : TIMESTAMP VALUE

for example:

$ pvput SYS:DEMO::CA_BEAC_TIME 1
Old : 2025-01-08 10:23:03.959  15.0 
New : 2025-01-09 01:09:30.775  15.0

This helps indicate if something is read-only or not.