cmdlineTests: Extract script-based test out of cmdlineTests.sh

- Just extraction, with as few changes to the code as possible.

test/cmdlineTests/~compilation_tests/test.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# shellcheck source=scripts/common.sh
+source "${REPO_ROOT}/scripts/common.sh"
+# shellcheck source=scripts/common_cmdline.sh
+source "${REPO_ROOT}/scripts/common_cmdline.sh"
+
+printTask "Compiling various other contracts and libraries..."
+(
+    cd "$REPO_ROOT"/test/compilationTests/
+    for dir in */
+    do
+        echo " - $dir"
+        cd "$dir"
+        # shellcheck disable=SC2046 # These file names are not supposed to contain spaces.
+        compileFull --expect-warnings $(find . -name '*.sol')
+        cd ..
+    done
+)