"commandline -f foo" to skip queue and execute immediately

Commit c3cd68dda (Process shell commands from bindings like regular char
events, 2024-03-02) mentions a "weird ordering difference".
The issue is that "commandline -f foo" goes through the input
queue while other commands are executed directly.
For example

    bind ctrl-g "commandline -f end-of-line; commandline -i x"

is executed in the wrong order. Fix that.

This doesn't yet work for "commandline -f exit" but that can be fixed easily.

It's hard to imagine anyone would rely on the existing behavior.  "commandline
-f" in bindings is mostly used for repainting the commandline.

tests/pexpects/bind.py

@@ -358,6 +358,20 @@ send('\x02\x02\x02') # ctrl-b, backward-char
 sendline('\x1bu') # alt+u, upcase word
 expect_prompt("fooBAR")
 
+send("""
+    bind ctrl-g "
+        commandline --insert 'echo foo ar'
+        commandline -f backward-word
+        commandline --insert b
+        commandline -f backward-char
+        commandline -f backward-char
+        commandline -f delete-char
+    "
+""")
+send('\x07') # ctrl-g
+send('\r')
+expect_prompt("foobar")
+
 # Check that the builtin version of `exit` works
 # (for obvious reasons this MUST BE LAST)
 sendline("function myexit; echo exit; exit; end; bind ctrl-z myexit")