refactor: add additional Telescope state check

[samuelhgf]

Changes

• Add one more verification of existence of Telescope on the project. Letting be disabled trough env var when running tests.
• Change use o Telescope class to CONST

References

Testing

Contributor Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 code of conduct

[samuelhgf]

@evansims I later saw this other place with the infinite loop workarorund.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.69%. Comparing base (9ff4aa7) to head (29c710a).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #447   +/-   ##
=========================================
  Coverage     99.69%   99.69%           
- Complexity      535      536    +1     
=========================================
  Files            31       31           
  Lines          1332     1332           
=========================================
  Hits           1328     1328           
  Misses            4        4           

Flag	Coverage Δ
unittestsvalidate	99.69% <ø> (ø)

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[evansims]

LGTM, thanks @samuelhgf