plans.sscan_step_1D(): generalize

[prjemian]

These steps will generalize the plan for step, table, or fly scans:

• change name to sscan_1D
• add kwarg: step_data="primary", value is name of document stream to be used, allow None if do not save this, this is the data made available after each step in a scan
• add kwarg: array_data=None, value is name of document stream to be used, allow None if do not save this, this is the array data posted when the scan is complete
• add kwarg: full_read="{sscan.name}_full", value is name of document stream to be used, do not save if None, this is the information returned by sscan.read() and is recorded after the scan completes
• add kwarg: poll_delay_s=0.001 for how long to wait in polling loop during scan.
• add kwarg: phase_timeout_s=60 for how long to wait since last update of the .FAZE field was received

[prjemian]

Consider moving this to be with the sscan device support, as well