Add more information in server smoke test

[HanaGemela]

owncloud/core#36143 (comment)

Please make the below changes to the server smoke test:
Testing setup

1. Step 1 - Encryption is enabled correctly - please explain what correctly exactly means
2. Step 3 - Set up two external storages different, disable encryption in one of them. - could you provide How To?
   Testing functionality
3. Step 2 -Open internet explorer or edge and upload a new avatar - How do you upload an avatar?
4. Step 5 - Using webdav upload a 100MiB file. No errors in this process - Could you provide more details?

And there are no steps at all for Scenarios to consider:

OAuth2 and sync + mobile clients ( can be deployed remotely ) @davitol
LDAP @davitol
Shibboleth @davitol (Tested with autoprovision Mode)
Windows Network Drive (also use it as sync target ) @davitol
Guests @davitol
Impersonate @davitol
Login with App Token Login @davitol
TOTP @davitol

Please write down as much information as possible. Try to look at the test as someone not familiar with the server and describe it in a way everyone will understand. E.g. what the apps do, what the steps are, expected results