[PACKS] #5 Add custom request units (if any) to the confirmation email for partner requests.
Summary
Add custom request units (if any) to the confirmation email for partner requests.(assumes [PACKS] step-3 (#4398) is complete)
Why
This is step-5 of adding the ability to specify "packs" versus "individual" for requests
Details
Add the units (only if selected and not the default ) at the end of each description in the confirmation email for partner requests.
e.g.
Diapers Size 2 - 10 packs
Diapers Size 5 - 50
N.B.
All of the changes for PACKS must be implemented behind a flipper flag "enable_packs"
Criteria for completion
- [ ] functionality as described above
- [ ] tests that support the functionality as described above
Background
The following sections have been identified as required for the PACKS implementation. These should be implemented in numerical order.

I would like to work on this one...
This issue is marked as stale due to no activity within 30 days. If no further activity is detected within 7 days, it will be unassigned.
PR #4419 was superseded by #4421, which has been merged.