Create a public vtkext module that can be used by both libf3d and plugins #5180

Job	Run time
Update LFS data cache	8s
external-build	45s
webassembly	46s
android (armeabi-v7a)	1m 17s
android (arm64-v8a)	1m 10s
android (x86)	1m 12s
android (x86_64)	1m 10s
macos_arm (commit, no-bundle)	1s
macos (commit, no-bundle)	3m 36s
macos_arm (v9.3.0, no-bundle)	1s
macos (v9.3.0, no-bundle)	3m 51s
coverage	1m 7s
macos_arm (v9.2.6, no-bundle)	1s
linux (commit, standard)	1m 9s
macos (v9.2.6, no-bundle)	3m 49s
macos_arm (commit, bundle)	3m 52s
linux (v9.3.0, standard)	1m 16s
macos (commit, bundle)	3m 51s
linux (v9.2.6, standard)	1m 9s
python-packaging (ubuntu)	1m 9s
windows (commit)	2m 50s
linux (v9.1.0, standard)	1m 8s
windows (v9.3.0)	2m 43s
linux (v9.0.0, standard)	1m 28s
python-packaging (windows)	3m 7s
windows (v9.2.6)	2m 45s
linux (headless, commit, raytracing, optional-deps, no-exclude-deprecated, egl)	1m 9s
python-packaging (macos)	1s
linux (exclude_deprecated, commit, raytracing, optional-deps, exclude-deprecated, no-egl)	1m 12s
sanitizer (address)	1m 1s
linux (no_optional_deps, commit, no-raytracing, no-optional-deps, no-exclude-deprecated, no-egl)	49s
sanitizer (thread)	1m 25s
static-analysis	1m 10s
sanitizer (undefined)	1m 4s
	53m 12s

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