Batch upload & other performance enhancements

[aufdenkampe]

We'll consider this step 2 of 2(ish) in addressing the larger issue (and opportunity) raised by @tpwrules with:

• #649

This PR pulls the code from https://github.com/tpwrules/ODM2DataSharingPortal/tree/wip/batch that is successfully running a private instance of Monitor My Watershed for the Univ. of Memphis.

We should probably merge this PR only after merging this smaller PR that contains the first 4 commits:

• #637

@ptomasula, @tpwrules, and @SRGDamia1, as a followup to our call today, I decided to create this PR to the new tpw_batch feature branch that I just created from develop.

This gives @ptomasula the ability to resolve the merge conflicts, complete the merge, then test it using CDK, without interfering with our current branches.

If merging and testing of the tpw_batch goes perfectly, we can then merge into develop.

If there are challenges with merging or testing, then perhaps we cherry-pick some of the easier commits first.