TEST_CASE_PERSISTENT_FIXTURE: A new fixture macro for allowing persistent fixtures throughout a TEST_CASE (#2885)

This PR introduces a new `TEST_CASE` macro called `TEST_CASE_PERSISTENT_FIXTURE`. `TEST_CASE_PERSISTENT_FIXTURE` offers the same functionality as `TEST_CASE_METHOD` except for one difference. The object on which the test method is invoked is only created once for all invocations of the test case. The object is created just after the `testCaseStarting` event is broadcast and the object is destroyed just before the `testCaseEnding` event is broadcast.

The main motivation for this new functionality is to allow `TEST_CASE`s to do expensive setup and teardown once per `TEST_CASE`, without having to resort to abusing event listeners or static function variables with manual initialization.


Implements #1602

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Co-authored-by: Martin Hořeňovský <martin.horenovsky@gmail.com>

docs/cmake-integration.md

@@ -8,6 +8,7 @@
 [`CATCH_CONFIG_*` customization options in CMake](#catch_config_-customization-options-in-cmake)<br>
 [Installing Catch2 from git repository](#installing-catch2-from-git-repository)<br>
 [Installing Catch2 from vcpkg](#installing-catch2-from-vcpkg)<br>
+[Installing Catch2 from Bazel](#installing-catch2-from-bazel)<br>
 
 Because we use CMake to build Catch2, we also provide a couple of
 integration points for our users.