Python debugging entrypoint rewrite incorrect if it contains parenthesis.

[j-windsor]

Description of the issue:
on skaffold debug was getting the error > [contacts-85bf9984d6-hlfkp contacts] /bin/sh: 1: Syntax error: "(" unexpected, so I escaped the parenthesis, which fixed debug, but caused dev to error with > [contacts-8668d9cdbb-f9xch contacts] Failed to parse 'create_app\\(\\)' as an attribute name or function call. It seems like the rewrite of the entrypoint during debug is causing some string escaping issues?

Expected behavior:
I do not have to escape the parenthesis and it will work in both dev and debug.

Steps to reproduce:

1. use Use pure python entrypoints to unbreak skaffold debugging GoogleCloudPlatform/bank-of-anthos#501 (note that the parenthesis are not escaped)
2. skaffold dev works :)
3. skaffold debug does not work :(

Environment:
OS: macOS v11.4
Skaffold: v1.25.0