Add handling for max string length on pydaq controls, labels

[ZLLentz]

Expected Behavior

• Should truncate the string automatically if it is created automatically

Current Behavior

• Likely just raises the pydaq exception

[ddamiani]

Just to note the latest version of pydaq (10.2.4+) will throw a ValueError if the length of the name field for pv controls, monitors, and labels is longer than 32 bytes (including a null terminator in that 32, so the string length is really 31).

The value field of the pv labels is 64.