[misc] Fix zsh path argument completion (#14953)

Closes #14952
Authored by: matyb08

devscripts/zsh-completion.py

@@ -18,6 +18,7 @@ def build_completion(opt_parser):
             for opt in group.option_list]
     opts_file = [opt for opt in opts if opt.metavar == 'FILE']
     opts_dir = [opt for opt in opts if opt.metavar == 'DIR']
+    opts_path = [opt for opt in opts if opt.metavar == 'PATH']
 
     fileopts = []
     for opt in opts_file:
@@ -26,6 +27,12 @@ def build_completion(opt_parser):
         if opt._long_opts:
             fileopts.extend(opt._long_opts)
 
+    for opt in opts_path:
+        if opt._short_opts:
+            fileopts.extend(opt._short_opts)
+        if opt._long_opts:
+            fileopts.extend(opt._long_opts)
+
     diropts = []
     for opt in opts_dir:
         if opt._short_opts: