feat(rum-explorer): add custom element to control access to and visibility of domainkeys

[aem-code-sync[bot]]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed. In case there are problems, just click a checkbox below to rerun the respective action.

• [ ] Re-run PSI checks
• [ ] Re-sync branch

Commits

* [dd06dd5](https://github.com/adobe/helix-website/commit/dd06dd55b27cc0f250e265c3906b0dcce9c585d1) :white_check_mark: (latest) * [128339c](https://github.com/adobe/helix-website/commit/128339ce212e3190a86dd578f2e6d2daf54832b2) :white_check_mark: * [a270c37](https://github.com/adobe/helix-website/commit/a270c3775e846e7d6a0f06c5026c8774dc263ad0) :white_check_mark: