gdcm, itk, vtk@8.2: drops, migrations, and re-deprecation

[cho-m]

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• Alternative to gdcm,vtk@8.2: migrate to python@3.10 #106947
• Related to Deprecated formulae with dependents #106902
• Blocked by opencv 4.6.0 with related migrations to jpeg-turbo, python@3.10, and ffmpeg #107250

[cho-m]

Enabled general ITK_USE_SYSTEM_LIBRARIES. Also added ITK_USE_SYSTEM_DOUBLECONVERSION, which isn't enabled by general option and needs to be manually set.

Note that there is a bundled copy of openjpeg that cannot be dropped due to InsightSoftwareConsortium/ITK#1807

[cho-m]

Dropped BUILD_TESTING as it is part of std_cmake_args.

Dropped ITK_USE_STRICT_CONCEPT_CHECKING as no longer used https://github.com/InsightSoftwareConsortium/ITK/blob/v5.2.1/CMakeLists.txt#L485-L487

if(ITK_USE_STRICT_CONCEPT_CHECKING)
  message(WARNING "Compilers requiring ITK_USE_STRICT_CONCEPT_CHECKING are no longer suppported.  This variable is no longer used.")
endif()

Other changes are mainly re-ordering.

[BrewTestBot]

🤖 A scheduled task has triggered a merge.