Update dependency i18next-parser to v8 (#82085)

* Update dependency i18next-parser to v8

* remove deprecated option

* fix lockfile

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Ashley Harrison <ashley.harrison@grafana.com>

package.json

@@ -173,7 +173,7 @@
     "html-loader": "5.0.0",
     "html-webpack-plugin": "5.6.0",
     "http-server": "14.1.1",
-    "i18next-parser": "6.6.0",
+    "i18next-parser": "8.12.0",
     "jest": "29.7.0",
     "jest-canvas-mock": "2.5.2",
     "jest-date-mock": "1.0.8",

public/locales/i18next-parser.config.js

@@ -13,7 +13,4 @@ module.exports = {
   failOnWarnings: true,
 
   verbose: false,
-
-  // Don't include default values for English, they'll remain in the source code
-  skipDefaultValues: (locale) => locale !== 'en-US',
 };