GDALOpen(): avoid error messages in OF_SHARED mode and with OVERVIEW_LEVEL option (fixes #8599)

[rouault]

No description provided.

[coveralls]

coverage: 67.808% (+0.001%) from 67.807% when pulling 666677b on rouault:fix_8599 into 5d3638a on OSGeo:master.

[rouault]

The backport to release/3.7 failed:

The process '/usr/bin/git' failed with exit code 1

stderr

error: could not apply 666677b401... GDALOpen(): avoid error messages in OF_SHARED mode and with OVERVIEW_LEVEL option (fixes #8599)
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

stdout

Auto-merging autotest/cpp/test_gdal.cpp
CONFLICT (content): Merge conflict in autotest/cpp/test_gdal.cpp
Auto-merging gcore/gdaldataset.cpp
CONFLICT (content): Merge conflict in gcore/gdaldataset.cpp

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-release/3.7 release/3.7
# Navigate to the new working tree
cd .worktrees/backport-release/3.7
# Create a new branch
git switch --create backport-8616-to-release/3.7
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick 666677b401bdcda43aa41c0bc67abb6d0f0e93ff
# Push it to GitHub
git push --set-upstream origin backport-8616-to-release/3.7
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-release/3.7

Then, create a pull request where the base branch is release/3.7 and the compare/head branch is backport-8616-to-release/3.7.

[rouault]

not appropriate for 3.7 backport as initial fix only made to master 3.8dev