CLI: Replace stop-all command with --all option in site stop

[nightnei]

Related issues

• Fixes STU-1191

Proposed Changes

Removes the studio site stop-all CLI command in favor of an --all option in the studio site stop command

Off topic: I am working on trying to simplify code to have one function to stop either one or all sites, but so far I don't like the result, so I decided to create this PR, and then I will work a bit more to try to make code more beautiful.

Testing Instructions

1. npm run cli:build
2. Create 3 sites
3. node dist/cli/main.js site list
4. Assert that all of them are run
5. node dist/cli/main.js site stop --all
6. Assert that all of them are stopped
7. Run again node dist/cli/main.js site stop-all
8. Assert No sites are currently running
9. Start 1 site
10. node dist/cli/main.js site stop --all
11. Assert that you see the message that only one was stopped
12. node dist/cli/main.js site stop --path=/path/to/site
13. Assert that one site was stopped w/o regressions

[nightnei]

Nothing new or changed here, I just moved all tests as is

[fredrikekelund]

My bad for pushing e973903. That commit was meant for #2299.

[fredrikekelund]

While it's not a huge deal, it still irked me that this is the only command with two different runCommand functions. I opened #2374 with a suggestion for how we could refactor those two functions into a single one.