Trigger backend workflow on root pom.xml change (#1634)

* Trigger backend workflow on root pom.xml change

* Trigger e2e checks workflow on root pom.xml change

.github/workflows/backend.yml

@@ -7,6 +7,7 @@ on:
     types: ["opened", "edited", "reopened", "synchronize"]
     paths:
       - "kafka-ui-api/**"
+      - "pom.xml"
 jobs:
   build-and-test:
     runs-on: ubuntu-latest

.github/workflows/e2e-checks.yaml

@@ -7,6 +7,7 @@ on:
       - "kafka-ui-contract/**"
       - "kafka-ui-react-app/**"
       - "kafka-ui-e2e-checks/**"
+      - "pom.xml"
 jobs:
   build-and-test:
     runs-on: ubuntu-latest