alpha_release-7-157-1

What's Changed

• Build: Default to RelWithDebInfo, Add --debug,--release to build.py by @WhoBrokeTheBuild in #3002
• Build: Keep Jenkins builds for 90 days by @WhoBrokeTheBuild in #3014
• Fix: delete unused functions to support IDL 5.1 and earlier by @mwinkel-dev in #3008

Full Changelog: alpha_release-7-157-0...alpha_release-7-157-1