feat(e2e): enable access continuum as optional dependency

[sdrozdsap]

Closes: https://jira.tools.sap/browse/CXSPA-6523

Testing

Prerequisites
Enable continuum.example-e2e.cy.ts to run in CI by renaming it to continuum.e2e.cy.ts

Scenario 1
IF Env variable for CONTINUUM_REGISTRY_TOKEN exists THEN test should run. Currently it is failing so we expect a failing CI job
Result: CI Run

Scenario 2
IF Env variable for CONTINUUM_REGISTRY_TOKEN doesn't exist THEN test file should run, but all access-continuum related methods will be skipped. Therefore CI job should pass. We expect warning in the logs about missing CONTINUUM_REGISTRY_TOKEN
Result: CI Run

Scenario 3
IF Env variable for CONTINUUM_REGISTRY_TOKEN contains invalid value THEN test file should run, but all access-continuum related methods will be skipped. Therefore CI job should pass. We expect to not have warning in the logs about missing CONTINUUM_REGISTRY_TOKEN
Result: CI Run

Next steps

Figure out if there is a better way to indicate that continuum doesn't run the test. Currently there is a warning, but the test passes

[github-actions]

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[cypress]

spartacus    Run #47017

Run Properties:   Passed #47017  •  830fbb714f ℹ️: Merge c2efddd722fa0f383adfdac107a196b858fe0630 into 8e47b2eb18f1508e20ffb6ffc356...

Project	spartacus
Branch Review	feat/reenable-access-continuum
Run status	Passed #47017
Run duration	04m 40s
Commit	830fbb714f ℹ️: Merge c2efddd722fa0f383adfdac107a196b858fe0630 into 8e47b2eb18f1508e20ffb6ffc356...
Committer	sdrozdsap
View all properties for this run ↗︎

---

Test results
Failures	0
Flaky	3
Pending	2
Skipped	0
Passing	125
View all changes introduced in this branch ↗︎

[cypress]

spartacus    Run #47018

Run Properties:   Passed #47018  •  09bfd6343f: [TEST] Invalid CONTINUUM_ACCESS_TOKEN

Project	spartacus
Branch Review	feat/reenable-access-continuum
Run status	Passed #47018
Run duration	12m 21s
Commit	09bfd6343f: [TEST] Invalid CONTINUUM_ACCESS_TOKEN
Committer	Sergiej Drozd
View all properties for this run ↗︎

---

Test results
Failures	0
Flaky	1
Pending	22
Skipped	0
Passing	815
View all changes introduced in this branch ↗︎

[github-actions]

Merge Checks Failed

Please push a commit to re-trigger the build. 
To push an empty commit you can use `git commit --allow-empty -m "Trigger Build"`

[github-actions]

Merge Checks Failed

Please push a commit to re-trigger the build. 
To push an empty commit you can use `git commit --allow-empty -m "Trigger Build"`