Do not create empty ".ssh" directory when loading config (#20289) #20298
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Backport #20289
The code is as old as back to 2016, creating the directory automatically is not correct IMO.
In other places for ssh key writing (RewriteAllPrincipalKeys / appendAuthorizedKeysToFile, etc), the directory will still be created when updating the keys.
This PR will resolve the confusing and annoying problem: the dummy and empty ".ssh" directory in new git home
Update: wait for #20299