Add bash completion for build --iidfile

This adds bash completion for https://github.com/moby/moby/pull/32406.

Signed-off-by: Harald Albers <github@albersweb.de>
(cherry picked from commit 1f8720717d)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

components/cli/contrib/completion/bash/docker

@@ -2221,6 +2221,7 @@ _docker_image_build() {
 		--cpu-period
 		--cpu-quota
 		--file -f
+		--iidfile
 		--label
 		--memory -m
 		--memory-swap
@@ -2265,7 +2266,7 @@ _docker_image_build() {
 			__docker_complete_image_repos_and_tags
 			return
 			;;
-		--file|-f)
+		--file|-f|--iidfile)
 			_filedir
 			return
 			;;