Use LDAP paged search in GetUserSPNs.py

[ShutdownRepo]

Original PR: fortra#1487

[ThePirateWhoSmellsOfSunflowers]

Tested on a prod env. OK
See fortra#1485 for more info

[ShutdownRepo]

@SAERXCIT @ThePirateWhoSmellsOfSunflowers it seems original PR (fortra#1487) is closed and new one is fortra#1498. I think we should close this PR and open a new one reflecting the changes of 1498 right?

[ThePirateWhoSmellsOfSunflowers]

No, it's because fixing a conflict between this repo and forta's one breaks PR on forta side. Another example is this PR fortra#1262, I think forta will never merge it because now, Podalirius branch contains 250+ commits instead of 1 (if I remember correctly).

As Porgs branch is 260+ commits ahead of forta, I think it is no longer possible to have a clean PR system between forta/porgs.

🌻

[ShutdownRepo]

Ok, understood, let's merge here
For PRs with lots of commits, fortra could always choose to squash & merge in order to keep commits history tight.
But yeah, I agreed, the more fortra waits on merging things, and the more ThePorgs progresses, the two forks will have troubles having a clean PR sync