SPM scheme cleanup (#8060)

Author: paulb777

.github/workflows/spm.yml

@@ -5,6 +5,7 @@ on:
     paths:
     - '.github/workflows/spm.yml'
     - 'Package.swift'
+    - '.swiftpm/*'
     - 'Gemfile*'
   schedule:
     # Run every day at 12am (PST) - cron uses UTC times

.gitignore

@@ -71,6 +71,9 @@ ReleaseTooling/Package.resolved
 scripts/code_coverage_report/*/Package.resolved
 scripts/code_coverage_report/*/.build
 
+# Bad sorts get generated if the package .xcscheme is not regenerated.
+.swiftpm/xcode/xcshareddata/xcschemes/Firebase-Package.xcscheme
+
 # Mint package manager
 Mint