corrects the storage and provider flag positioning to attach to the child command instead of the parent. Also corrects unit tests for flags to ensure flags are preset as expected.
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#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🐛 Bugfix
#### Test Plan
- [x] ⚡ Unit test
- [x] 💚 E2E
reduces channel message export data to the minimal set of valuable info: message content, creator,
creation and modification time, and replies (each
reply has the same data, sans other replies).
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#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🌻 Feature
#### Issue(s)
* #3991
#### Test Plan
- [x] 💪 Manual
- [x] 💚 E2E
various tidbits of data cleanup before moving forward with adding export behavior to groups.
* move duplicate collections mocks into data/mock
* move the export collection struct into pkg/export (to prevent future duplicates in the next PR)
* rename export.Collection to Collectioner, because it's an interface.
* some other non-logic rearrangement
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#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🧹 Tech Debt/Cleanup
#### Issue(s)
* #3991
#### Test Plan
- [x] ⚡ Unit test
- [x] 💚 E2E
#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🌻 Feature
#### Issue(s)
* #3989
#### Test Plan
- [x] 💪 Manual
- [x] ⚡ Unit test
