feat(forge test) option to list summary table only

### Component

Forge

### Describe the feature you would like

Motivation: Many tests fail when migrating from OZ 4 to OZ 5, esp. when you have hundreds of tests. One needs to see and report on the volume to be fixed.

The `forge test --summary --detailed` gives a nice overview, but the table is burned within the rest of the output.

I propose to have the flag `--summaryonly` , which would act similarly to ` --summary --detailed`, but would output only the table and the general stat `Encountered a total of xxx failing tests, zzz tests succeeded`

Current workaround is:
`forge test --summary --detailed | awk '/Test Summary:/,/----╯/'`

But that loses coloring.

I assume there might be some other workaround, I welcome any comments on this.

### Additional context

_No response_