test: migrate console_assert message test to snapshot

Migrate test/message/console_assert from the legacy Python-based
test runner to the JS snapshot approach used by
test-node-output-console.mjs.

The new fixture runs console.assert(false, Symbol('hello')) and
compares against a snapshot, removing the dependency on testcfg.py
and the .out file pattern.

Refs: #47707

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: galaxy4276

test/message/console_assert.js test/fixtures/console/console_assert.jstest/message/console_assert.js renamed to test/fixtures/console/console_assert.js

@@ -1,5 +1,5 @@
 'use strict';
 
-require('../common');
+require('../../common');
 
 console.assert(false, Symbol('hello'));

test/fixtures/console/console_assert.snapshot

@@ -0,0 +1 @@
+Assertion failed Symbol(hello)

test/message/console_assert.out

@@ -9,6 +9,7 @@ const skipForceColors =
 
 describe('console output', { concurrency: !process.env.TEST_PARALLEL }, () => {
   const tests = [
+    { name: 'console/console_assert.js' },
     { name: 'console/2100bytes.js' },
     { name: 'console/console_low_stack_space.js' },
     { name: 'console/console.js' },