Treat Exif.Sony1.PreviewImage as undefined tag (backport #2015)

[mergify]

This is an automatic backport of pull request #2015 done by Mergify.
Cherry-pick of a1ad29e has failed:

On branch mergify/bp/0.27-maintenance/pr-2015
Your branch is up to date with 'origin/0.27-maintenance'.

You are currently cherry-picking commit a1ad29ed.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   tests/bugfixes/github/test_issue_1881.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   src/tiffvisitor_int.cpp

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[kevinbackhouse]

Looks like Conan is acting up again. 😡

[clanmills]

I had trouble with conan on Saturday: #2012.

For the MinGW and Cygwin CI, I don't use conan to build. I install the dependencies with the package manager, get cmake to generate Makefile and build with make. That strategy doesn't scale well for Linux because different distros use different package managers. The weak link with conan seems to be getting the recipe from the remote server. It should be:

501 rmills@rmillsmm-local:~ $ conan remote list
conan-center: https://center.conan.io [Verify SSL: True]
502 rmills@rmillsmm-local:~ $ 

I only use conan to build the dependencies for Visual Studio. It works well. I encountered the "certificate out of date" on Saturday, changed conan-center, installed the latest conan and deleted the cache. Then it worked.

[piponazo]

I took the freedom to rebase the branch. After the changes done in the last days about conan, the situation should be solved.

[codecov]

Codecov Report

Merging #2016 (5adae7e) into 0.27-maintenance (2cbdfac) will increase coverage by 0.00%.
The diff coverage is 66.66%.

@@                Coverage Diff                @@
##           0.27-maintenance    #2016   +/-   ##
=================================================
  Coverage             46.36%   46.37%           
=================================================
  Files                   146      146           
  Lines                 23005    22999    -6     
  Branches              11809    11806    -3     
=================================================
- Hits                  10666    10665    -1     
+ Misses                 6689     6688    -1     
+ Partials               5650     5646    -4     

Impacted Files	Coverage Δ
src/tiffvisitor_int.cpp	54.54% <66.66%> (-0.09%)	⬇️
src/jpgimage.cpp	50.82% <0.00%> (+0.41%)	⬆️

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