universal-tshoot update/add workflows

root/etc/cont-init.d/95-apt-get

@@ -1,5 +0,0 @@
-#!/usr/bin/with-contenv bash
-
-if [ -f /usr/bin/apt ]; then
-    apt-get update
-fi

root/etc/cont-init.d/95-tshoot-config

@@ -1,16 +0,0 @@
-#!/usr/bin/with-contenv bash
-
-## Ubuntu
-if [ -f /usr/bin/apt ]; then
-    apt-get install --no-install-recommends -y \
-        dnsutils \
-        net-tools \
-        iputils-ping \
-        traceroute
-fi
-# Alpine
-if [ -f /sbin/apk ]; then
-    apk add --no-cache \
-        bind-tools \
-        net-tools
-fi