build: run SSR tests with cypress

[arturovt]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngxs/store/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Build related changes
[x] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

@markwhitfeld @splincode

What does this PR introduce?

• SSR tests are running with cypress as they have to be.
• Removed unnecessary packages, less packages = faster installation on the CI
• Removed @nguniversal/express-engine as it's just not needed.
• server.ts code became cleaner and much less than with @nguniversal/express-engine.
• Since now SSR tests can be run in the interactive GUI and such way is much easier to debug and watch what's wrong etc.
• That code ORIGIN_URL was just copied from some example and it is not used.

[splincode]

@arturovt, please fix conflicts