Prep for creation of 8.2 branch (#1762)

Removed changes from:
- etc/packages.yml

(selectively cherry picked from commit e0dda91f26)

.github/workflows/backport.yml

@@ -56,7 +56,7 @@ jobs:
       max-parallel: 1
       matrix:
         # 7.17 was intentionally skipped because it was added late and was bug fix only
-        target_branch: [7.13, 7.14, 7.15, 7.16, '8.0']
+        target_branch: [7.13, 7.14, 7.15, 7.16, '8.0', 8.1]
 
     steps:
       - name: Checkout repo

.github/workflows/lock-versions.yml

@@ -6,7 +6,7 @@ on:
           description: 'List of branches to lock versions (ordered, comma separated)'
           required: true
           # 7.17 was intentionally skipped because it was added late and was bug fix only
-          default: '7.13,7.14,7.15,7.16,8.0'
+          default: '7.13,7.14,7.15,7.16,8.0,8.1'
 
 jobs:
   pr: