[GHA][[COVERITY] added manual trigger (openvinotoolkit#2289)

Author: mryzhov

.github/workflows/coverity.yml

@@ -132,7 +132,7 @@ jobs:
         working-directory: ${{ env.BUILD_DIR }}
 
       - name: Submit to coverity
-        if: github.event_name == 'schedule'
+        if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
         run: |
           apt-get update && apt-get install -y curl jq
           pushd ${BUILD_DIR}
@@ -161,7 +161,7 @@ jobs:
         run: ${{ env.COV_TOOL_DIR }}/bin/cov-configure -c ${{ env.COV_TOOL_DIR }}/config/coverity_config.xml -lscc text
 
       - name: Save Coverity Tool
-        if: always() && github.event_name == 'workflow_dispatch'
+        if: always() && github.event_name == 'schedule'
         uses: actions/cache/save@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
         with:
           key: coverity-${{ runner.os }}-${{ github.sha }}