Move entrypoint script to common/bin directory

Also, finalized stuff, KEK.

tests/common/bin/logger.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+LOGGER_TARGET_FILE="/var/tests/exec-log.txt"
+
+if [[ $LOG_EVERYTHING == "" || $LOG_EVERYTHING == "false" ]]; then
+  exec "$@"
+fi
+
+# based on https://gitlab.com/friendly-telegram/friendly-telegram/-/blob/master/install.sh#L43-49, but a bit modified
+# for our use case
+log() {
+  # Runs the arguments and spins once per line of stdout (tee'd to logfile), also piping stderr to logfile
+  { "$@" 2>>$LOGGER_TARGET_FILE || return $?; } | while read -r line; do
+    spin
+    printf "%s\n" "$line" >> $LOGGER_TARGET_FILE
+  done
+}
+
+log "$@"

tests/ubuntu/bin/logger.sh

@@ -1,7 +0,0 @@
-#!/bin/bash
-
-LOGGER_TARGET_FILE="/var/tests/exec-log.txt"
-
-if [[ $LOG_EVERYTHING == "" || $LOG_EVERYTHING == "false" ]]; then
-  exec "$@"
-fi