fix(run): add cwd/node_modules/.bin to run command search path (#7151)

* fix(run): change run command to check cwd/node_modules/.bin for commands. Fixes run in workspaces.

This fixes a bug that was introduced in #6850 where the bin path was being built only from
`config.lockfileFolder`. However in workspaces, bins may not be hoisted to the workspace root,
causing bins to not be found. This change adds `config.cwd` to the bin search path, so the `yarn
run` command will look in a workspace package's node_modules, as well as the workspace root.

fixes #7126

* modify chagelog