Further inspector_protocol Cleanups

- Shebang lines with python in them
- Executive bits
- Removed extra copy of script (convert_to_protocol_json.py)

To be rolled into Chromium:
https://chromium-review.googlesource.com/c/chromium/src/+/1139098

To be rolled into v8:
https://chromium-review.googlesource.com/c/v8/v8/+/1139095

Change-Id: I7e96754207c996c0b8ebdc3af58610297ddbceb8
6 files changed