chore: bump mockttp from 1.2.2 to 2.0.1 in /web3.js (#17870)

* chore: bump mockttp from 1.2.2 to 2.0.1 in /web3.js

Bumps [mockttp](https://github.com/httptoolkit/mockttp) from 1.2.2 to 2.0.1.
- [Release notes](https://github.com/httptoolkit/mockttp/releases)
- [Commits](https://github.com/httptoolkit/mockttp/compare/v1.2.2...v2.0.1)

---
updated-dependencies:
- dependency-name: mockttp
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix browser tests

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Justin Starry <justin@solana.com>

web3.js/test/rollup.config.js

@@ -14,7 +14,7 @@ export default {
     include: ['test/**/*.test.ts'],
     exclude: ['test/agent-manager.test.ts', 'test/bpf-loader.test.ts'],
   },
-  external: ['node-forge', 'http2', '_stream_wrap'],
+  external: ['node-forge', 'http2', '_stream_wrap', 'mockttp'],
   output: {
     file: 'test/dist/bundle.js',
     format: 'es',