Fix UI hang when loading data for 0 or negative canvas sizes (#1563)

The `calculateResolution` function is used to work out the horizontal
resolution at which data should be loaded for a given timespan and
horizontal width (e.g. of a canvas) in px. If either of these values are
0 or negative, this function currently returns 1n. This causes issues as
loading data at a resolution of 1 is rarely what you actually want to do
in this instance, and it usually produces very slow queries which can
cause the UI to hang and generally become unresponsive.

This patch makes `calculateResolution` return a `Result<bigint>` type
instead, and returns an error value when the inputs are 0 or negative.
Using a `Result<T>` type rather than throwing an error forces callers to
handle the error case at the callsite so it cannot be ignored. In this
case, if resolution cannot be caulculate then it's safe to skip
rendering, and the callsites have been modified to do so.

Fixes: https://b.corp.google.com/issues/418232042