Added details to the stickiness policy under load balancing

[harikrishna-patnala]

Here I've added details to explain different stickiness methods and options provided to configure.

[harikrishna-patnala]

@blueorangutan docbuild

[blueorangutan]

@harikrishna-patnala a Jenkins job has been kicked to build the document. I'll keep you posted as I make progress.

[blueorangutan]

QA-Doc build preview: https://qa.cloudstack.cloud/builds/docs-build/pr/312. (QA-JID 72)

[harikrishna-patnala]

Here it is https://qa.cloudstack.cloud/builds/docs-build/pr/312/adminguide/networking_and_traffic.html#sticky-session-policies-for-load-balancer-rules

[borisstoyanov]

LGTM

[andrijapanicsb]

@DaanHoogland please see if this can be included to the 4.18.1 release as well, since the related UI changes will be part of 4.18.1+

[andrijapanicsb]

cc @harikrishna-patnala ^^^

[harikrishna-patnala]

@andrijapanicsb the related PR#7434 was merged in main for 4.19. We may need to port both PRs back to 4.18 branch. Not sure if this will create forward merge conflicts.

[andrijapanicsb]

My point is - we have to have the documentation updated for whatever branch the original UI changes are done (I see 4.18.1 as the milestone for the UI changes, so the docs also needs to be there for the same branch/release).

I leave to you experts to do the magic ;)