[DO-1519] some refactoring (!77)

Co-authored-by: Rustam Tagaev <rustam.tagaev@avroid.tech>
Reviewed-on: https://git.avroid.tech/DevOps/jenkins-pipelines/pulls/77

jobs-dsl/folders/Cloud.groovy

@@ -18,6 +18,16 @@ folder('Cloud/Deploy') {
     description('Deploy jobs')
 }
 
+folder('Cloud/Deploy/Backend') {
+    displayName('Deploy Backend')
+    description('Deploy Backend jobs')
+}
+
+folder('Cloud/Deploy/Frontend') {
+    displayName('Deploy Frontend')
+    description('Deploy Frontend jobs')
+}
+
 folder('Cloud/Automation') {
     displayName('Automation')
     description('Automation jobs')