fix(workspaces): Passes arguments follwing "--" when running a workspace script

[rally25rs]

fixes #7776

Summary

Passes arguments following -- when running a workspace script (for example yarn workspace pkg run command -- arg).

Previously these parameters were being trimmed off and ignored.

It seems that in src/cli/index.js we were trimming all params after and including the --, and assigning the remainder to flags.originalArgs which the workspace command was using.

Instead, this PR changes the workspace command to use the args parameter that was already being passed to the command, which includes the args after the --.
The args parameter to the command is also what the yarn run command uses, so it makes sense for yarn run and yarn workspace run to both use args instead of one using args and the other using flags.originalArgs.

Test plan

Since yarn parameter passing in src/cli/index.js is not tested, there are no additional tests.

A manual test can be performed by setting up a basic workspace project:

package.json

{
  "name": "yarn-7776",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "private": true,
  "workspaces": [
    "packages/*"
  ]
}

packages/pkg1/package.json

{
  "name": "pkg1",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "scripts": {
    "start": "./start.sh"
  }
}

packages/pkg1/start.sh

#!/bin/bash
echo "$@"

then run the yarn command

yarn workspace pkg1 run start -- one two three

The output from the script should be one two three

[rally25rs]

🤦‍♂ this PR basically just undoes what I did in #5534 to fix another bug. back to the drawing board...