[LinuxConsumption] Add config option to list file names that need exe permissions

cc @anthonychu
Related to https://github.com/Azure/azure-functions-host/issues/5696

On linux consumption plan, extracting the files removes executable file permissions. This blocks launching binaries from function app. Fix for #5696 added executable permissions for http worker defaultExe file.

This issue is to track exposing a config option that allows users to list the files that need executable permissions.

Note: We cannot edit permissions for all the files as it will add to cold start.

Review the fix for related issue #5696 and the existing HTTP worker `defaultExe` handling first. Then locate the Linux Consumption extraction and configuration entry points; done means a configuration list controls executable permissions for selected files without applying permissions to every extracted file.

Written by the indexing model from the issue text.