Chrome importer should import each source with sourceMapURL if it exists

[canova]

Currently Chrome importer generates a sourceTable entry when the sample contains some sources. But it looks like now Chrome trace profiles contains ScriptCatchup entries when the it's recorded with disabled-by-default-devtools.v8-source-rundown category (which is enabled by default now despite the name), like this:

{
  "args": {
    "data": {
      "executionContextId": 3,
      "hasSourceUrl": false,
      "isModule": true,
      "isolate": "14261501104024015583",
      "scriptId": 7,
      "sourceMapUrl": "/index-XVVABR7J.js.map",
      "url": "https://profiler.firefox.com/index-XVVABR7J.js"
    }
  },
  "cat": "disabled-by-default-devtools.v8-source-rundown",
  "dur": 2,
  "name": "ScriptCatchup",
  "ph": "X",
  "pid": 39856,
  "tdur": 1,
  "tid": 5694409,
  "ts": 194791085102,
  "tts": 56845
}

Example chrome trace:

Trace-20260715T220108.json.gz

It looks like this entry is pretty similar to our sourceTable entry! We have both url and sourceMapUrl that we need. So we should definitely use these entries to fill the source table with the correct source maps.

┆Issue is synchronized with this Jira Task