Merge topic 'FindJPEG-imported-targets'

87f2cf3b1c FindJPEG: Add imported target support and full test
13952a3b7f FindJPEG: Add multi config support and associated docs
1f6649b7d1 FindJPEG: Add version detection and associated test update and docs
8d07408a62 FindJPEG: Cleanup documentation formatting
e70da3f0f3 FindJPEG: Clean up whitepaces and lowercase function names

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1974