Fix some flaky tests

[cirospaciari]

What does this PR do?

• Documentation or TypeScript types (it's okay to leave the rest blank in this case)
• Code changes
• Test Changes

How did you verify your code works?

Running on CI/CD the tests

[github-actions]

❌ @cirospaciari 3 files with test failures on bun-darwin-aarch64:

• test/bundler/bundler_browser.test.ts
• test/js/bun/test/test-test.test.ts
• test/js/node/stubs.test.js

View test output

^{#dd7527f1747da74a5d26808b76aa5a7dc2f476d4}

[github-actions]

❌ @cirospaciari 3 files with test failures on linux-x64-baseline:

• test/bundler/bundler_browser.test.ts
• test/js/node/stubs.test.js
• test/js/web/fetch/fetch.test.ts

View test output

^{#dd7527f1747da74a5d26808b76aa5a7dc2f476d4}

[github-actions]

❌ @cirospaciari 3 files with test failures on linux-x64:

• test/bundler/bundler_browser.test.ts
• test/js/node/stubs.test.js
• test/js/web/fetch/fetch.test.ts

View test output

^{#dd7527f1747da74a5d26808b76aa5a7dc2f476d4}

[github-actions]

❌ @cirospaciari 7 files with test failures on bun-darwin-x64-baseline:

• test/bundler/bundler_browser.test.ts
• test/js/bun/spawn/spawn-streaming-stdin.test.ts
• test/js/bun/spawn/spawn.test.ts
• test/js/bun/sqlite/sqlite.test.js
• test/js/node/stubs.test.js
• test/js/third_party/webpack/webpack.test.ts
• test/js/web/timers/setTimeout.test.js

View test output

^{#dd7527f1747da74a5d26808b76aa5a7dc2f476d4}