[test] ofTexture more straightforward way to see if it support GL_RGB16F #1113

Job	Run time
build-emscripten (emscripten)	1m 36s
build-macos (osx, xcode)	2m 11s
build-linux64 (linux64, 64gcc6)	7m 47s
build-ios-tvos (ios, macos)	1m 58s
build-macos (osx, makefiles)	3m 35s
build-ios-tvos (tvos, macos)	3m 2s
build-msys2 (mingw64)	8m 44s
build-msys2 (ucrt64)	9m 12s
build-vs2022 (x64)	6m 31s
rpi-build (armv6l, armhf, arm-linux-gnueabihf, 1)	2m 26s
build-msys2 (clang64)	6m 22s
build-vs2022 (ARM64)	6m 33s
rpi-build (armv7l, armhf, arm-linux-gnueabihf, 1)	2m 9s
build-vs2022 (ARM64EC)	6m 28s
rpi-build (aarch64, arm64, aarch64-linux-gnu, 1)	2m 25s
	1h 10m 59s

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