Make node:fs load lazily

[Jarred-Sumner]

What does this PR do?

This makes node:fs load modules lazily. This also moves some Symbol.for usages into a shared internal/symbols module so we don't expose these APIs unintentionally.

After:

[1.29ms] require('fs')
[0.50ms] require('fs').StatWatcher

Before:

[7.31ms] require('fs')
[0.00ms] require('fs').StatWatcher

How did you verify your code works?

Existing tests

[github-actions]

❌ @Jarred-Sumner 10 files with test failures on bun-darwin-aarch64:

• test/cli/install/bun-run.test.ts
• test/cli/install/registry/bun-install-registry.test.ts
• test/integration/next/default-pages-dir/test/dev-server.test.ts
• test/integration/next/default-pages-dir/test/next-build.test.ts
• test/js/bun/test/test-test.test.ts
• test/js/bun/util/which.test.ts
• test/js/node/fs/fs.test.ts
• test/js/node/stream/node-stream.test.js
• test/js/third_party/webpack/webpack.test.ts
• test/js/web/fetch/fetch.stream.test.ts

View test output

^{#b6040e8956efe8a7867b0ef0ac418e18b745c4a8}

[github-actions]

❌ @Jarred-Sumner 8 files with test failures on linux-x64-baseline:

• test/cli/install/bun-run.test.ts
• test/cli/install/registry/bun-install-registry.test.ts
• test/integration/next/default-pages-dir/test/dev-server.test.ts
• test/integration/next/default-pages-dir/test/next-build.test.ts
• test/js/node/fs/fs.test.ts
• test/js/node/stream/node-stream.test.js
• test/js/third_party/webpack/webpack.test.ts
• test/js/web/fetch/fetch.stream.test.ts

View test output

^{#b6040e8956efe8a7867b0ef0ac418e18b745c4a8}

[github-actions]

❌ @Jarred-Sumner 9 files with test failures on linux-x64:

• test/cli/install/bun-run.test.ts
• test/cli/install/registry/bun-install-registry.test.ts
• test/integration/next/default-pages-dir/test/dev-server.test.ts
• test/integration/next/default-pages-dir/test/next-build.test.ts
• test/js/node/fs/fs.test.ts
• test/js/node/stream/node-stream.test.js
• test/js/node/watch/fs.watch.test.ts
• test/js/third_party/webpack/webpack.test.ts
• test/js/web/fetch/fetch.stream.test.ts

View test output

^{#b6040e8956efe8a7867b0ef0ac418e18b745c4a8}

[github-actions]

❌ @Jarred-Sumner 12 files with test failures on bun-darwin-x64-baseline:

• test/cli/install/bun-run.test.ts
• test/cli/install/registry/bun-install-registry.test.ts
• test/integration/next/default-pages-dir/test/dev-server.test.ts
• test/integration/next/default-pages-dir/test/next-build.test.ts
• test/js/bun/spawn/spawn-streaming-stdout.test.ts
• test/js/bun/util/which.test.ts
• test/js/node/fs/fs.test.ts
• test/js/node/stream/node-stream.test.js
• test/js/third_party/webpack/webpack.test.ts
• test/js/web/fetch/fetch.stream.test.ts
• test/js/web/timers/setTimeout.test.js
• test/js/web/worker.test.ts

View test output

^{#b6040e8956efe8a7867b0ef0ac418e18b745c4a8}

[github-actions]

❌ @Jarred-Sumner 13 files with test failures on bun-darwin-x64:

• test/cli/install/bun-run.test.ts
• test/cli/install/registry/bun-install-registry.test.ts
• test/integration/next/default-pages-dir/test/dev-server.test.ts
• test/integration/next/default-pages-dir/test/next-build.test.ts
• test/js/bun/ffi/ffi.test.js
• test/js/bun/spawn/spawn-streaming-stdout.test.ts
• test/js/bun/util/which.test.ts
• test/js/node/fs/fs.test.ts
• test/js/node/stream/node-stream.test.js
• test/js/node/watch/fs.watchFile.test.ts
• test/js/third_party/webpack/webpack.test.ts
• test/js/web/fetch/fetch.stream.test.ts
• test/js/web/timers/setTimeout.test.js

View test output

^{#b6040e8956efe8a7867b0ef0ac418e18b745c4a8}