Add gzip support to error tracking collector

What does this MR do and why?

This MR adds functionality to decompress JSON body for error tracking collector.

We need this for error tracking API to work correctly. Since Sentry SDK can send us requests with gzip json: Content-type: application/json, Content-encoding: gzip.

Closes #342488 (closed)

This is necessary for #340178 (closed)

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