refactor: use smaller image for category tests #363

Job	Run time
windows (X64, Release)	9m 57s
linux (amd64, gcc-debug-ninja)	2m 16s
windows (X64, Debug)	11m 2s
linux (amd64, gcc-release-ninja)	1m 27s
linux (amd64, oldgcc-debug-make)	2m 26s
linux (amd64, clang-release-ninja)	1m 34s
linux (amd64, clang-release-ninja-static)	2m 24s
linux (amd64, oldclang-debug-make)	2m 6s
linux (arm64v8, gcc-debug-ninja)	4m 39s
linux (arm64v8, gcc-release-ninja)	3m 15s
linux (arm64v8, oldgcc-debug-make)	4m 51s
linux (arm64v8, clang-release-ninja)	2m 30s
linux (arm64v8, clang-release-ninja-static)	14m 59s
linux (arm64v8, oldclang-debug-make)	4m 20s
linux (amd64, clang-asan-ninja)	6m 38s
linux (amd64, clang-tsan-ninja)	3m 46s
linux (amd64, clang-ubsan-ninja)	2m 45s
linux (amd64, gcc-debug-noperfmon-ninja)	2m 3s
linux (amd64, clang-coverage-ninja)	1m 55s
	1h 24m 53s

Provide feedback