Bump libs/EXTERNAL/libcatch2 from `4e8d92b` to `33e24b1` #27

Job	Run time
Run-tests (vtr_reg_nightly_test1, 16)	2h 7m 42s
Run-tests (vtr_reg_nightly_test1_odin, 16, -DWITH_ODIN=ON)	2h 43m 54s
Run-tests (vtr_reg_nightly_test2, 16)	4h 0m 25s
Run-tests (vtr_reg_nightly_test2_odin, 16, -DWITH_ODIN=ON)	4h 5m 37s
Run-tests (vtr_reg_nightly_test3, 16)	2h 0m 9s
Run-tests (vtr_reg_nightly_test3_odin, 16, -DWITH_ODIN=ON)	3h 15m 1s
Run-tests (vtr_reg_nightly_test4, 16)	3h 5m 2s
Run-tests (vtr_reg_nightly_test4_odin, 16, -DWITH_ODIN=ON)	1h 9m 59s
Run-tests (vtr_reg_nightly_test5, 16)	3h 29m 5s
Run-tests (vtr_reg_nightly_test6, 16)	3h 29m 44s
Run-tests (vtr_reg_nightly_test7, 16)	49m 57s
Run-tests (vtr_reg_strong, 16, -DVTR_ASSERT_LEVEL=3, libeigen3-dev)	16m 7s
Run-tests (vtr_reg_strong_odin, 16, -DVTR_ASSERT_LEVEL=3 -DWITH_ODIN=ON, libeigen3-dev)	18m 57s
Run-tests (vtr_reg_strong_odin, 16, -skip_qor, -DVTR_ASSERT_LEVEL=3 -DVTR_ENABLE_SANITIZE=ON -DWI...	1h 9m 38s
Run-tests (vtr_reg_system_verilog, 16, -DYOSYS_F4PGA_PLUGINS=ON)	22m 33s
Run-tests (odin_reg_strong, 16, -DWITH_ODIN=ON)	1h 0m 45s
Run-tests (parmys_reg_strong, 16, -DYOSYS_F4PGA_PLUGINS=ON)	2h 32m 55s
	1d 11h 57m 30s

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