Getting empty response enable compression

[infovivek2020]

Problem: #4552

While Enable the copression getting Emty response

Action:

Made the compress function compatible with mem.BufferSlice return type so the calling function can get the result as per specification

Release Note: NA

[linux-foundation-easycla]

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[purnesh42H]

Please open the PR on your fork. Open here once you fix all the issues