[utils] Replace the `uuid` dependency with `crypto.randomUUID()`

[cryptodev-2s]

Carried over from MetaMask/utils#289, which was open when @metamask/utils moved into core.

packages/utils declares uuid@^9.0.1 as a production dependency and @types/uuid@^9.0.8 as a dev dependency, for a single call site:

// packages/utils/src/fs.ts:244
const directoryPath = path.join(os.tmpdir(), projectName, uuidV4());

crypto.randomUUID() has been available since Node 14.17 and the package requires Node 22, so the dependency can go. That also drops @types/uuid and one entry from every consumer's tree.

fs.test.ts currently spies on the module (jest.spyOn(uuid, 'v4')), so the test needs reworking alongside it.