Move run_integration_test.sh to scripts folder

We have just 3 scripts (1 soon to be gone because it is unnecessary),
so there is no need to have 2 folders for them.

Author: Lorak-mmk

.github/workflows/integration-tests.yml

@@ -33,10 +33,10 @@ jobs:
       run: |
         export EVENT_LOOP_MANAGER=${{ matrix.event_loop_manager }}
         export SCYLLA_VERSION='release:5.1'
-        ./ci/run_integration_test.sh tests/integration/standard/ tests/integration/cqlengine/
+        ./scripts/run_integration_test.sh tests/integration/standard/ tests/integration/cqlengine/
     
     - name: Test tablets
       run: |
         export EVENT_LOOP_MANAGER=${{ matrix.event_loop_manager }}
         export SCYLLA_VERSION='release:6.0.2'
-        ./ci/run_integration_test.sh tests/integration/experiments/
+        ./scripts/run_integration_test.sh tests/integration/experiments/