deps: need to cherrypick async fix into inspector code generator

[cclauss]

An 'async' is a reserved word in Python >= 3.7 fix has been landed upstream at https://chromium-review.googlesource.com/c/deps/inspector_protocol/+/1781351

That change needs to be downstreamed into deps/v8/third_party/inspector_protocol/code_generator.py because python3.7 ./configure.py ; NODE=$(which node) make test still fails as discussed in #29326

#29346 and #29520 attempted to do this but were rejected for various reasons but this needs to be completed. The problem with #29520 is that it did not follow the tool-based process but that process is based on the change being mirrored into https://github.com/v8/v8/blob/master/third_party/inspector_protocol/code_generator.py but that is not the upstream repo that was modified.

[bnoordhuis]

third_party/inspector_protocol in upstream V8 gets updated every once in a while. No action on our side is necessary, we can just float the patch locally until upstream syncs up with its upstream.