[rhcos-4.10] mantle: overhaul azure authentication #3366
Merged
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This is a partial backport of 50f6205. Rather than doing any library changes here (since the versions of libraries on these older branches are mostly frozen in time) we are just picking up the changes to the credentials file we use as input where we now have a single azureCreds.json rather than two (azureProfile.json and azureAuth.json).
In order to support this I still need to get the information back into a AZURE_AUTH_LOCATION formatted file for the old library to be able to read the data. For now we'll just write it out to a temporary file that gets cleaned up immediately after use. This isn't great, but the limited usage here only for older branches executed in our downstream pipeline makes it less of a concern.
(cherry picked from commit 92daef1)