lib/azure_blob_req: remove hardcoded response buf allocs
lib/azure_blob_req: remove hardcoded response buf allocs

The connection layer is capable of allocating chunked-transfer (no clen
header) response buffers on demand, so don't bother allocating a fixed
size response buffer.

Signed-off-by: David Disseldorp <589a549dc9f982d9f46aeeb82a09ab6d87ccf1d8@suse.de>

ddiss/elasto,ddiss/elasto