add workflows to add to or create library and sample tables based on demultiplexing output

[tomkinsc]

This PR adds one new workflows:

• populate_library_and_sample_tables_from_flowcell populate library and sample tables with per-library-lane and per-sample (i.e. named references to one or more libraries) using existing demultiplexing output

It also adds the same functionality of the above workflow as an optional step executed after demux by the existing demux_deplete workflow, if the input insert_demux_outputs_into_terra_tables=true, using outputs passed directly from demultiplexing rather than live table data

These workflows rely on a new task, also added by this PR:

• tasks_terra.wdl::create_or_update_sample_tables

[dpark01]

So I looked through this and overall looks great. The populate_library_and_sample_tables_from_flowcell is a mouthful but I can't think of anything better.

My main thing is I'm not a fan of the demux_deplete_and_table_insert as it currently stands. One minor thing is that it's got a ton of boilerplate workflow level inputs that are only used once (to set subworkflow inputs that could have been just left unbound).

But the bigger thing is that I think it might be better if this whole thing were just an optional toggle-able behavior in demux_deplete and not a separate workflow. I.e. maybe a boolean workflow input to demux_deplete that says "do the table insert thing" and then add an if block to the end that calls the two terra-specific tasks (if both requested and possible).

[tomkinsc]

Good point RE the half-dozen or so workflow-level inputs of demux_deplete_and_table_insert.
If we're ready to include the table functionality as an optional step of demux_deplete, I'll add it to that workflow and remove the then-redundant demux_deplete_and_table_insert workflow.