Github action scheduled notification

[Super-Sage]

Pull Request Template

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Add notification for GitHub action schedule run. Notification will be look like below when schedule failed.

Checklist

• [x] The code change is covered by unit tests. I have added tests that prove my fix is effective or that my feature works
• [x] I have performed end-to-end test locally.
• [x] New and existing unit tests pass locally with my changes
• [x] I have commented my code, particularly in hard-to-understand areas
• [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	93%	91%	766	✔
Summary	93% (2030 / 2185)	91% (471 / 520)	766	✔

Minimum allowed line rate is 50%

[arpavan]

Just general feedback: I'm fine with leaving the notifications going as-is to the target teams channel, and we could re-assess the volume of notifications and the intended audience as needed in the future.

[arpavan]

@Super-Sage consider trying this plugin as well. Looks like it can do a lot more so we could benefit from its features - https://github.com/marketplace/microsoft-teams-for-github