.mergify: Set max parallel checks to 1
.mergify/config.yml: Remove rebase_fallback attribute (deprecated)
.azurepipelines: Remove FINISHED and FAILED states
.mergify: Simplify Mergify rules using GitHub status checks
BaseTools/Scripts: Ignore Mergify merge commits in PatchCheck.py
.mergify: Enable Mergify for stable/* branches
Readme.md: Add CI build status badges
.mergify: Add Mergify YML pull request rules configuration file