Modify script execution in CI

Currently when scripts run in CI all are run regardless of whether a previous one fails. This makes it difficult to capture what the real issue was with a broken pipeline in CI.

This change moves the find command into a simple bash loop that iterates over all scripts. Execution immediately breaks when one script fails.

Closes #366 (closed)

tests/bash/021_fail.sh

+#!/usr/bin/env bash
+echo "ERROR"
+exit 1
\ No newline at end of file