test: drop --interactive in non-interactive docker sessions

With a self-hosted runner we get the following classic error when
calling `make test-unit`:

    make[1]: Entering directory '/home/runner/_work/infix/infix/buildroot'
    /home/runner/_work/infix/infix/test/env /home/runner/_work/infix/infix/test/9pm/9pm.py /home/runner/_work/infix/infix/test/case/all-repo.yaml /home/runner/_work/infix/infix/test/case/all-unit.yaml
    the input device is not a TTY
    make[2]: *** [/home/runner/_work/infix/infix/board/x86_64/board.mk:14: test-unit] Error 1

This patch drops interactive from all non-interactive docker sessions.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

board/x86_64/board.mk

@@ -18,7 +18,7 @@ test test-qeneth:
 		$(BR2_EXTERNAL_INFIX_PATH)/test/9pm/9pm.py \
 			$(INFIX_TESTS))
 test-sh test-qeneth-sh:
-	$(call test-env-qeneth,/bin/sh)
+	$(call test-env-qeneth,-i /bin/sh)
 
 test-run: | ~/.infix-test-venv
 	$(call test-env-run,\

test/env

@@ -104,7 +104,7 @@ name()
 containerize=yes
 [ -c /dev/kvm ] && kvm="--device=/dev/kvm"
 
-while getopts "Cf:hKp:q:t:" opt; do
+while getopts "Cf:hiKp:q:t:" opt; do
     case ${opt} in
 	C)
 	    containerize=
@@ -115,6 +115,9 @@ while getopts "Cf:hKp:q:t:" opt; do
 	h)
 	    usage && exit 0
 	    ;;
+	i)
+	    interactive="--interactive"
+	    ;;
 	K)
 	    kvm=
 	    ;;
@@ -146,7 +149,7 @@ if [ "$containerize" ]; then
 	 --expose 9001-9010 --publish-all \
 	 --hostname "$(name)" \
 	 --name "$(name)" \
-	 --interactive \
+	 $interactive \
 	 --rm \
 	 --security-opt seccomp=unconfined \
 	 --sysctl net.ipv6.conf.all.disable_ipv6=0 \