fix(session health): Enable some commented out tests (#96773)

These tests were 'disabled' because of bad indentation :(

In all cases they were 'fixed' by adjusting the interval ranges. It
seems like previously these tests assumed that the intervals we would
return were based on the current timestamp. So if I made a request at
`12:15`, asking for `6h` intervals, then i would get data for `12:15 ->
18:15` and so on.

It seems like now, and this is related to work done on insights, we're
adjusting the intervals based on the bucket size (example `6h`) so that
they align with the full day of data. This is better for queries and
users imo!
So if you have a startTime of like, `11:15` the bucket that falls into
would be `06:00 -> 12:00`

Author: ryan953