test: improve WPT runner to summarize status and update WPT

test: update WPT interfaces and hr-time

This commit updates the interfaces to https://github.com/web-platform-tests/wpt/tree/8ada332aea/interfaces and updates the hr-time test status:

• window-worker-timeOrigin.window.js should be skipped because we don't implement Blob
• idlharness.any.js should be skipped since the IDL parser needs to be updated, but the parser update would also result in an update of the test harness which in turn requires updates of other tests. We need to fix the URL implementation first, and then update the harness and all the tests.

test: refactor WPTRunner

• Print test results as soon as they are available, instead of until after all the tests are complete. This helps us printing tests whose completion callback is not called because of failures.
• Run the scripts specified by // META: script= one by one instead of concatenating them first for better error stack traces.
• Print a status summary when the test process is about to exit. This can be used as reference for updating the status file.

For example the stderr output of out/Release/node test/wpt/test-console.js would be:

{
  'idlharness.any.js': {
    fail: {
      expected: [
        'assert_equals: operation has wrong .length expected 1 but got 0'
      ]
    }
  }
}
Ran 4/4 tests, 0 skipped, 3 passed, 1 expected failures, 0 unexpected failures

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines