Upgrade apollo portal Frontend to modern tech stack

[DiegoKrupitza]

As already described in #4016 the current framework (AngularJs) is outdated and its LTS will end December 31, 2021 (https://blog.angular.io/stable-angularjs-and-long-term-support-7e077635ee9c).

The best idea is to switch from AngularJs to Angular. Although I think we should not limit ourselves to Angular and explore other options as some comments in #4016 suggest.

I suggest before working on this issue the PMC should make a decision what framework to use and why. Not that someone works on resolving this issue, which a certain framework, and later can not be used because of the community decision.

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it has not had activity in the last 7 days. If this issue is still valid, please ping a maintainer and ask them to label it as "help wanted". Thank you for your contributions.