Need some e2e tests for APKAM-enrolled clients

[gkc]

Describe the bug

We have no e2e tests right now which prove that APKAM-enrolled atsign_1 can successfully communicate with APKAM-enrolled atsign_2

Expected behavior

Something like this in the e2e tests:

• create and then approve an APKAM enrollment for atSign1
• create and then approve an APKAM enrollment for atSign2
• Test put, get, delete (and their auto-notifications) atSign1 to atSign2 using APKAM to APKAM, APKAM to pkam, pkam APKAM (in this shorthand terminology, pkam to pkam is what we currently test)
• Ideally refactor existing e2e tests to extract out the common stuff so we can then run them with whichever combination we want (current: pkam to pkam)

[gkc]

@sitaram-kalluri @murali-shris i have thoughts about how to do this easily, now that I've done this for NoPorts. I'll add a comment here over the weekend describing the approach

[sitaram-kalluri]

Currently, the E2E tests are running successfully. The unit tests are failing with dart beta version due to following dart issue: https://github.com/dart-lang/sdk/issues/55911#issuecomment-2153606884. Pending work is to update the dependencies and check if the issue is resolved.