Revert compound re-ordering for non extended selectors

[mgreter]

Tested against ruby sass 3.7.4 since this is still the compatibility goal for current libsass branch.

.red-icon {
    color: red;
}

a:before.nested {
    &.error {
      @extend .red-icon;
      qwe: asd;
    }
}

.red-icon {
    color: blue;
}

:before {
    &.red-icon2 {
        foo: bar;
    }
}

:before {
    &.red-icon {
        foo: baz;
    }
}

.asd#asd {
    &qwe {
        asd: qwe;
    }
}

:before {
    &.qwe#{&} {
        asd: qwe;
    }
}

a :before.baz {a: b}
:foo {@extend .baz}

Expected output as from ruby sass and previous libsass:

.red-icon, a.nested.error:before {
  color: red; }

a:before.nested.error {
  qwe: asd; }

.red-icon, a.nested.error:before {
  color: blue; }

:before.red-icon2 {
  foo: bar; }

:before.red-icon, a.nested.error:before {
  foo: baz; }

.asd#asdqwe {
  asd: qwe; }

:before.qwe:before {
  asd: qwe; }

a :before.baz, a :foo:before {
  a: b; }

Output by dart sass which differs from ruby sass and previous libsass:

.red-icon, a:before.nested.error {
  color: red;
}

a:before.nested.error {
  qwe: asd;
}

.red-icon, a:before.nested.error {
  color: blue;
}

:before.red-icon2 {
  foo: bar;
}

:before.red-icon, a.nested.error:before {
  foo: baz;
}

.asd#asdqwe {
  asd: qwe;
}

:before.qwe:before {
  asd: qwe;
}

a :before.baz, a :foo:before {
  a: b;
}