[misc] Replace XOR ^ conditions by exactly_one helper in providers

[Taragolis]

Follow-up: #27775 (comment)

This PR potentially add more code readability. exactly_one helper exists in Airflow 2.3 so it should be safe to use it in providers packages.

I also added additional tests fro conditions which not tested before

[vincbeck]

I dont have strong opinion on that topic (whether we should use ^ or exactly_one) but I tend to prefer using native operators/functions when it is possible than custom ones. Although I agree, in some cases it is more readable with exactly_one. Again, I am totally fine with these changes, I just wanted to bring it up :)

[potiuk]

Nice. This is precisely one of those small improvements we can do now with min-version bump :)