Update Global/MATLAB.gitignore to include broader set of transitory files

[rpurser47]

Reasons for making this change: Our customers have asked for a more complete .gitignore for the MATLAB family of products. I've worked with developers at MathWorks to identify a number of transitory file types that should be in the .gitignore.

Links to documentation supporting these rule changes:

• Expanded the list of autosave file extensions and caching files based on developer feedback
• Added content-obscured file extension
• Added deployable archive file extension
• Added Cloud based storage dotfile