workspace: Copy -plugin properties for standalone workspace
workspace: Copy -plugin properties for standalone workspace

When a standalone workspace is created, always copy the -plugin
properties from the run into the workspace.

Fixes https://github.com/bndtools/bnd/issues/3509

Signed-off-by: BJ Hargrave <3d26bb3930946e3370762d769a073cece444c2d8@bjhargrave.com>

psoreide/bnd,psoreide/bnd,psoreide/bnd