Do not lose message parameters in UploadFromChunks::verifyChunk()

Do not lose message parameters in UploadFromChunks::verifyChunk()

This change is similar to If9ce05045ada1e3f55e031639e4c4ebc2a216de8

Having verifyChunk inside doStashFile was annoying. We'd have to
catch the exception in UploadBase::tryStashFile in order to convert
it to a proper Status object instead of the generic one that is
currently built there.
I felt like UploadBase::tryStashFile shouldn't have to be aware of
this exception, so I moved that catch into a new
UploadFromChunks::tryStashFile.
It makes no sense to perform that check twice when running
tryStashFile, so I got rid of it in doStashFile. But that also
meant we had to add it to a few other (now deprecated) places calling
doStashFile... But they should be cleaned up at some point anyway.

This will make sure we get error output like this:
"code":"filetype-bad-ie-mime",
"key":"filetype-bad-ie-mime",
"params":["text/html"]

instead of:
"code":"stashfailed",
"key":"Cannot upload this file because Internet Explorer would detect it as \"text/html\", which is a disallowed and potentially dangerous file type.",
"params":[]

Bug: T32095
Change-Id: I2fa767656cb3a5b366210042b8b504dc10ddaf68