Add trailing slash exclude paths (Azure#39825)

Author: JimSuplizio

eng/pipelines/pullrequest.yml

@@ -14,7 +14,7 @@ pr:
     # any excludes here. The reason being is that we can't access
     # pr->paths->exclude
     exclude:
-    - sdk/cosmos
+    - sdk/cosmos/
 
 parameters:
   - name: Service
@@ -31,4 +31,4 @@ extends:
     # See pr->paths->exclude comment above. Anything added/removed there
     # needs to be added/removed here.
     ExcludePaths:
-      - sdk/cosmos
+      - sdk/cosmos/

eng/scripts/Language-Settings.ps1

@@ -51,7 +51,7 @@ function Get-python-AdditionalValidationPackagesFromPackageSet {
   # The targetedFiles needs to filter out anything in the ExcludePaths
   # otherwise it'll end up processing things below that it shouldn't be.
   foreach ($excludePath in $diffObj.ExcludePaths) {
-    $targetedFiles = $targetedFiles | Where-Object { -not $_.StartsWith($excludePath.TrimEnd("/") + "/") }
+    $targetedFiles = $targetedFiles | Where-Object { -not $_.StartsWith($excludePath) }
   }
 
   if ($targetedFiles) {