Remove Msapp Conversion code

[NavneetThekkumpat]

Pull Request Template

Description

Remove Msapp Conversion code.

PR referred for the code removed https://github.com/microsoft/PowerApps-TestEngine/pull/66/files

Checklist

• [x] I have performed end-to-end test locally.
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I used clear names for everything
• [x] I have performed a self-review of my own code

[github-actions[bot]]

Package	Line Rate	Branch Rate	Complexity	Health
Microsoft.PowerApps.TestEngine	94%	91%	773	✔
Summary	94% (2043 / 2170)	91% (479 / 526)	773	✔

Minimum allowed line rate is 50%