Merge topic 'cmSystemTools-hash-cleanup'

4980f47b46 cmGlobalGenerator: always support generating rule hashes
b334dc84c3 cmLocalGenerator: always support shortening filenames
36bd3d82f8 cmSystemTools: move `ComputeCertificateThumbprint` to the only consumer
a4e4daceaf cmSystemTools: remove `ComputeFileHash` method
0abde043d2 cmCryptoHash: prefer to cmSystemTools::ComputeFileHash
4d5198a986 cmSystemTools: remove `ComputeStringMD5` method
ec5f1c489a cmCryptoHash: prefer to cmSystemTools::ComputeStringMD5

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Merge-request: !8695