Fix the expectation of the port canonicalization in URLPattern

[sisidovski]

Fixes whatwg/urlpattern#260.

This test expectation was updated in #49782 but it turned out the browser should raise an error.

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[sisidovski]

@annevk @anonrig Could you review this? Thanks!

[annevk]

I believe the correct version of this test is this:

  {
    "pattern": [{ "protocol": "http", "port": "80 " }],
    "inputs": [{ "protocol": "http", "port": "80" }],
    "expected_obj": {
      "protocol": "http",
      "port": "80"
    },
    "expected_match": null
  },

That is because "80 " does not fail parsing. It just does not get normalized to the empty string. But it will get normalized to "80" (without trailing space).

[annevk]

I created #51316 to show how I think this should look like.