* [infra] Fix helper.py as per feedback from @evverx + fix issues from #1519.
* Remove stuff from local testing
* Suppress unnecessary output from GSUtil.
* [infra] Enable clange code coverage reports generation for local runs.
* Use runner image and move corpus management to the helper.py
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* Clean up, delete unnecessary stuff, add comments.
* Run fuzz targets in parallel. Do not exit in case of an error.
* Address review feedback, except of the threading thing.
* Fix a typo.
* Use ThreadPool implementatino available in standard python2.7 package.
* Add dry run support + no corpus download option.
* Fix flags handling + add log output in case of an error.
* Append arguments for fuzz target instead of replacing them.
* Remove dry run functionality as it currently errors out after two runs.
* Fix some spacing in the code.
* Update documentation regarding new code coverage script.
Max Moroz