chore: `test:lib` task-caching w/ Nx (#5116)

* adding quick caching test

* reverting workflow change

* updating pr yml to test nx speed

* fixing yml on property

* fixing yml on property

* fixing target name

* upping to running4 in parallel

* upping to running 5 in parallel

* upping to running 6 in parallel

* upping to running 7 in parallel

* upping to running 8 in parallel

* upping to running 9 in parallel

* upping to running 10 in parallel

* opting for --parallel=5

* cleaning up nx.json

* revert touching of ci.yml file

* reverting on property of pr.yml file

* updating root pacakge.json test:lib command

* fixing frozen lockfile error in ci

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Co-authored-by: Dominik Dorfmeister <office@dorfmeister.cc>