Fix context storage provider property name (#7318)

[LaurentTreguier]

This change makes error messages use the existing CONTEXT_STORAGE_PROVIDER_PROPERTY constant to fix the name of the system property being slightly different.
This solves issue #7318

[linux-foundation-easycla]

• ✅login: LaurentTreguier / (827ef63)

The committers listed above are authorized under a signed CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.85%. Comparing base (acc64ee) to head (827ef63).
Report is 1 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@ ## main #7342 +/- ## ============================================ - Coverage 89.86% 89.85% -0.01%  + Complexity 6896 6895 -1  ============================================ Files 786 786 Lines 20789 20789 Branches 2025 2025 ============================================ - Hits 18681 18680 -1  Misses 1466 1466 - Partials 642 643 +1 

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[jkwatson]

Thanks!