Skip nightly conversations details test (#4781)

<!-- PR description-->

See https://github.com/alcionai/corso/issues/4780

---

#### Does this PR need a docs update or release note?

- [ ] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No

#### Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [x] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Issue(s)

<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* #<issue>

#### Test Plan

<!-- How will this be tested prior to merging.-->
- [ ] 💪 Manual
- [ ] ⚡ Unit test
- [x] 💚 E2E

src/cli/backup/groups_e2e_test.go

@@ -464,6 +464,10 @@ func runGroupsDetailsCmdTest(suite *PreparedBackupGroupsE2ESuite, category path.
 
 	t := suite.T()
 
+	if category == path.ConversationPostsCategory {
+		t.Skip("skipping conversation details test, see issue #4780")
+	}
+
 	ctx, flush := tester.NewContext(t)
 	ctx = config.SetViper(ctx, suite.dpnd.vpr)