…ed from CLI

Sometimes CLI options have restrictions based on other CLI options. This is the case
for `--event-time-start` and `--event-time-end`. Unfortunately, click doesn't provide
a good way for validating this, at least not that I found. Additionaly I'm not sure
if we have had anything like this previously. In any case, I couldn't find a
centralized validation area for such occurances. Thus I've gone and added one,
`validate_option_interactions`. Long term if more validations are added, we should
add this wrapper to each CLI command. For now I've only added it to the commands that
support `event_time_start` and `event_time_end`, specifically `build` and `run`.

…is less than the current time

…se UTC