test: Remove clearTestState for ViewHierarchyTests

[philipphofmann]

The SentryViewHierarchyTests only need to reset the SentryDependencyContainer and not reset the whole global test state.

#skip-changelog

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.622%. Comparing base (c379c5e) to head (3d69cd1).

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3940       +/-   ##
=============================================
- Coverage   90.663%   90.622%   -0.042%     
=============================================
  Files          581       582        +1     
  Lines        45434     45523       +89     
  Branches     16169     16225       +56     
=============================================
+ Hits         41192     41254       +62     
- Misses        4172      4199       +27     
  Partials        70        70               

Files	Coverage Δ
Tests/SentryTests/SentryViewHierarchyTests.swift	91.911% <100.000%> (ø)

... and 24 files with indirect coverage changes

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