Add Chromium-only Blender WebEngine parity work

blender-5.2.0/tests/utils/readme.rst

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+
+Test Utilities
+==============
+
+These tests are not intended to run as part of automated unit testing,
+rather they can be used to expose issues though stress testing or other less predictable
+actions that aren't practical to include in unit tests.
+
+Examples include:
+
+- Loading many blend files from a directory, which can expose issues in file reading.
+- Running operators in various contexts which can expose crashes.
+- Simulating user input for so ``git bisect`` can be performed on bugs that require user interaction.
+- Fuzz testing file importers & file format support.
+
+Note that we could make reduced versions of these tests into unit tests at some point.