feat: Add download csv button to people management

[marlonkeating]

Jira Ticket

This change adds a button for downloading the filtered results of the people table on the People Management tab.

Testing Instructions

• Check out branch and start with npm run start:stage
• Navigate to https://localhost.stage.edx.org:1991/exec-ed-2u-integration-qa/admin/people-management
• Click 'Download all' button on People table, verify all people are exported in csv
• Type in search box to filter people by name
• Click 'Download all' button on People table, verify only filtered people are exported in csv

For all changes

• Ensure adequate tests are in place (or reviewed existing tests cover changes)

Only if submitting a visual change

• Ensure to attach screenshots
• Ensure to have UX team confirm screenshots

[codecov]

Codecov Report

Attention: Patch coverage is 86.66667% with 6 lines in your changes missing coverage. Please review.

Project coverage is 85.79%. Comparing base (383989c) to head (e611011).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...gement/data/hooks/useEnterpriseMembersTableData.js	20.00%	4 Missing ⚠️
.../components/PeopleManagement/DownloadCSVButton.jsx	92.30%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1369   +/-   ##
=======================================
  Coverage   85.79%   85.79%           
=======================================
  Files         609      610    +1     
  Lines       13384    13429   +45     
  Branches     2780     2784    +4     
=======================================
+ Hits        11483    11522   +39     
- Misses       1831     1837    +6     
  Partials       70       70           

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[kiram15]

Just a couple things but looks good!

[kiram15]

Can we add in a test for filtered results?

[marlonkeating]

Good point! The DownloadCsvButton component doesn't have awareness of filters, and this would have to be tested at the level of the PeopleManagementPage. As of right now there are no unit tests for the table part of the PeopleManagementPage, and adding that I feel is a substantial enough task outside the scope of this change to address it as a separate ticket.