[K/N] Move special backend checks test sources to diagnostic tests folder

^KT-61564

compiler/testData/diagnostics/nativeTests/specialBackendChecks/runtest.sh

@@ -0,0 +1,12 @@
+#
+# Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+# Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+#
+
+# Usage: compiler/testData/diagnostics/nativeTests/specialBackendChecks/runtest.sh <t??.kt> <-language-version 1.9>
+
+FILTERED_FILE=/tmp/$(basename $1)
+# Remove diagnostic directives from test source
+cat $1 | sed -e 's/<![a-zA-Z_!]*!>//g' | sed -e 's/<!>//g' > $FILTERED_FILE
+shift
+konanc -opt-in=kotlin.native.internal.InternalForKotlinNative "$FILTERED_FILE" "$@"