PyAPI: remove use of BaseException

BaseException was used as a catch-all in situations where it
didn't make sense and where "Exception" is more appropriate
based on Python's documentation & error checking tools,
`pylint` warns `broad-exception-caught` for e.g.

BaseException includes SystemExit, KeyboardInterrupt & GeneratorExit,
so unless the intention is to catch calls to `sys.exit(..)`,
breaking a out of a loop using Ctrl-C or generator-exit,
then it shouldn't be used.

Even then, it's preferable to catch those exceptions explicitly.

tools/utils/addr2line_backtrace.py

@@ -219,7 +219,7 @@ def main() -> None:
             try:
                 with open(backtrace_filepath, 'r', encoding="utf-8", errors="surrogateescape") as fh:
                     bactrace_data = fh.read()
-            except BaseException as ex:
+            except Exception as ex:
                 print("Filed to open {!r}, {:s}".format(backtrace_filepath, str(ex)))
                 continue