March 2022 Release - Include Local copy of CodeSignTool as backup

What's Changed

• Case 32506 - Update Download Url and add Local Copy by @JaspreetSanghra in #2
• Tweak bash call to not exit on error by @JaspreetSanghra in #3
• Add Null variable by @JaspreetSanghra in #4
• Hotfix2 nullvar by @JaspreetSanghra in #5

Full Changelog: 21.12.1...22.3.1