NIFI-11987: Set read buffer size in PutAzureBlobStorage_v12

[turcsanyip]

Increased the read buffer size in order to avoid OOME due to too many buffer allocations (exceeding vm.max_map_count on Linux).

Summary

NIFI-11987

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  • JDK 17

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[nandorsoma]

LGTM, thanks for the fix @turcsanyip!