[9.1] Unskip network policy test (#230136) (#230144)

# Backport

This will backport the following commits from `main` to `9.1`:
- [Unskip network policy test
(#230136)](#230136)

<!--- Backport version: 10.0.1 -->

### Questions ?
Please refer to the [Backport tool
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Author: ersin-erdal

x-pack/platform/test/reporting_api_integration/reporting_and_security/screenshot/network_policy.ts

@@ -16,8 +16,7 @@ export default function ({ getService }: FtrProviderContext) {
   /*
    * The tests server config implements a network policy that is designed to disallow the following Canvas worksheet
    */
-  // Failing: See https://github.com/elastic/kibana/issues/193433
-  describe.skip('Network Policy', () => {
+  describe('Network Policy violation', () => {
     before(async () => {
       await reportingAPI.initLogs(); // includes a canvas worksheet with an offending image URL
     });