test(json): add test case for JSON exception boundary behavior

- Verify json_decode with JSON_THROW_ON_ERROR throws JsonException on invalid input
- Confirm json_encode with recursive structure throws JsonException when using JSON_THROW_ON_ERROR
- Test json

tests/compiler/basic/json-exception-boundary.phpt

@@ -0,0 +1,50 @@
+--TEST--
+JSON optimized functions preserve PHP exceptions and option semantics
+--FILE--
+<?php
+
+function main(): void
+{
+    try {
+        json_decode('{broken', true, 512, JSON_THROW_ON_ERROR);
+        echo "decode-not-caught\n";
+    } catch (JsonException $exception) {
+        echo "decode-caught\n";
+    }
+
+    $recursive = [];
+    $recursive['self'] = &$recursive;
+    try {
+        json_encode($recursive, JSON_THROW_ON_ERROR);
+        echo "encode-not-caught\n";
+    } catch (JsonException $exception) {
+        echo "encode-caught\n";
+    }
+
+    var_dump(json_decode('{broken') === null);
+    var_dump(json_last_error() === JSON_ERROR_SYNTAX);
+    var_dump(json_decode('{"value":1}') instanceof stdClass);
+    var_dump(json_last_error() === JSON_ERROR_NONE);
+
+    $object = json_decode('{"value":1}', false, 512, JSON_OBJECT_AS_ARRAY);
+    var_dump($object instanceof stdClass);
+
+    try {
+        json_decode('{}', true, 0);
+        echo "depth-not-caught\n";
+    } catch (ValueError $exception) {
+        echo "depth-caught\n";
+    }
+
+}
+
+?>
+--EXPECT--
+decode-caught
+encode-caught
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+depth-caught