[cpp] Add Snappy library to Docker images for building C++ packages #8086
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Motivation
The program crashes when Snappy compression is enabled on the C++ client packaged as RPM/DEB. This is because Snappy library is not included in the Docker image for building the RPM/DEB package.
https://github.com/apache/pulsar/pull/4259/files#diff-bda8db832e446d092d38464123ed17bc
https://github.com/apache/pulsar/pull/4259/files#diff-7e441fcfcb20e339c71f7f8f48569579
Modifications
Added Snappy library to the docker images.