Adds support for two escaping mechanisms in bus vector and bus group
parsing to allow net names with spaces inside bus constructs in one of
two common ways
1. Backslash escaping: Data\ Bus[1..4] or BUS{Net\ One Net\ Two}
2. Quoted strings: "Data Bus"[1..4] or BUS{"Net One" "Net Two"}
Fixes https://gitlab.com/kicad/code/kicad/-/issues/9258
(cherry picked from commit 66e232bc36)