Automatic merge from submit-queue (batch tested with PRs 47918, 47964, 48151, 47881, 48299)

GZip openapi schema if accepted by client

**What this PR does / why we need it**: Uses gzip "Accept-Encoding" flag rather than specific path to download gzipped openapi schema.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #48375

**Special notes for your reviewer**:

**Release note**:

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