Unbundle dev-cpp/catch
https://bugs.gentoo.org/951166
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -5,22 +5,9 @@

 set(CATCH_CONFIG_FAST_COMPILE ON CACHE BOOL "")
 set(CATCH_CONFIG_NO_EXPERIMENTAL_STATIC_ANALYSIS_SUPPORT ON CACHE BOOL "")
-FetchContent_Declare(Catch2
-    GIT_REPOSITORY https://github.com/catchorg/Catch2.git
-    GIT_TAG v3.8.1
-    GIT_SHALLOW ON)
-FetchContent_MakeAvailable(Catch2)
+find_package(Catch2 REQUIRED)
 include(Catch)

-# Build Catch2 in C++17 mode to enable C++17 features
-target_compile_features(Catch2 PRIVATE cxx_std_17)
-
-# Ensure that Catch2 sources and headers are not analyzed by any tools
-set_target_properties(Catch2 PROPERTIES COMPILE_OPTIONS "" EXPORT_COMPILE_COMMANDS OFF)
-set_target_properties(Catch2WithMain PROPERTIES EXPORT_COMPILE_COMMANDS OFF)
-set_target_properties(Catch2 Catch2WithMain PROPERTIES FOLDER "Dependencies")
-get_target_property(CATCH2_INCLUDE_DIRS Catch2 INTERFACE_INCLUDE_DIRECTORIES)
-target_include_directories(Catch2 SYSTEM INTERFACE ${CATCH2_INCLUDE_DIRS})

 add_library(sfml-test-main STATIC
     TestUtilities/SystemUtil.hpp