chore: fix article tag cloud and filter internal tags

[mhaack]

Filter all internal tags which are either not defined in the Content Hub tag list or don't have path assigned.

Relates to #391

Test URLs: Before: https://main--hlx-test--urfuwo.hlx.live/news/2020/02/sap-proaxia-intelligent-enterprise-solution-automotive-retail-sap-s-4hana After: https://feat-500-tagfilter--hlx-test--urfuwo.hlx.live/news/2020/02/sap-proaxia-intelligent-enterprise-solution-automotive-retail-sap-s-4hana

[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

* [a38cf74](https://github.com/urfuwo/hlx-test/commit/a38cf749052f63f9b2105a87236211dfa7d618fb) :white_check_mark: (latest) * [d73d545](https://github.com/urfuwo/hlx-test/commit/d73d545a9fc3c1f7c45c9d4ab793134ed6f1f54c) :white_check_mark:

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/news/2020/02/sap-proaxia-intelligent-enterprise-solution-automotive-retail-sap- s-4hana