Richer diff when running cortextool diff|sync

[gotjosh]

Right now, when you use the diff command it will only tell you which groups are going to be changed, but does not tell you which individual rules/alerts are changing.

I would be good to have an idea of what exactly is changing when you run this or the sync command.

[gotjosh]

To expand on this, it seems that running sync/diff after syncing will also result in updates - I would have expected this to no-op.

[justinTM]

@gotjosh take a look at this line:

cortex-tools/pkg/rules/compare.go

Line 215 in 35691e0

if verbose {

trying to figure out how to increase verbosity with a flag

[justinTM]

@gotjosh it is forced to false always:

cortex-tools/pkg/commands/rules.go

Line 491 in 35691e0

return p.PrintComparisonResult(changes, false)

[justinTM]

@gotjosh see #199