fix(devtools): Handle nullish values passed to formatConsoleArguments (facebook#32372)

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## Summary

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When using React Devtools, calling `console.log('%s', null)` in userland
can cause it to throw an error:

```
TypeError: Cannot read properties of null (reading 'toString')
```

## How did you test this change?

Added a unit test.

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See 47ng/nuqs#808.

Author: franky47

packages/react-devtools-shared/src/__tests__/utils-test.js

@@ -470,5 +470,14 @@ function f() { }
         {},
       ]);
     });
+
+    it('formats nullish values', () => {
+      expect(formatConsoleArguments('This is the %s template', null)).toEqual([
+        'This is the null template',
+      ]);
+      expect(
+        formatConsoleArguments('This is the %s template', undefined),
+      ).toEqual(['This is the undefined template']);
+    });
   });
 });

packages/react-devtools-shared/src/backend/utils/formatConsoleArguments.js

@@ -58,7 +58,7 @@ export default function formatConsoleArguments(
       }
       case 's': {
         const [arg] = args.splice(argumentsPointer, 1);
-        template += arg.toString();
+        template += String(arg);
 
         break;
       }