Feature: Introduce subresource integrity checks (SRI) for frontend assets (#100983)

* feat(featuremgmt): introduce feature toggle for enabling sri checks

* feat(frontend): use assetSriChecks feature toggle to inject integrity hash into script tags

* chore(webpack): align sri algorithms across dev and prod builds

* docs(featuremgmt): update assetSriChecks to pass CI

* docs(featuremgmt): fix more spelling complaints with assetSriChecks

* Add crossorigin attribute

* chore(webpack): add subresource-integrity plugin

* build(webpack): wrap webpack jsonp loader integrity checks in feature flag checks

* revert(index.html): remove crossorigin attribute if assertSriChecks is disabled

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Co-authored-by: Kristian Bremberg <kristian.bremberg@grafana.com>

package.json

@@ -248,6 +248,7 @@
     "webpack-livereload-plugin": "3.0.2",
     "webpack-manifest-plugin": "5.0.0",
     "webpack-merge": "6.0.1",
+    "webpack-subresource-integrity": "^5.2.0-rc.1",
     "webpackbar": "^7.0.0",
     "yaml": "^2.0.0",
     "yargs": "^17.5.1"