server/authorizer: inline readBody #8803

Job	Run time
Rego PR checks	15s
Generate Code	2m 12s
Go Lint	2m 55s
Go Test (linux)	6m 26s
Go Test (darwin)	6m 31s
Check Generated	47s
Go compat build/test (ubuntu-22.04, 1.19)	6m 37s
Go compat build/test (macos-latest, 1.19)	5m 9s
Go Build (linux amd64)	4m 33s
Go Build (linux arm64)	3m 43s
Go Build (windows)	4m 33s
Go Build (darwin)	4m 35s
Go Race Detector	9m 17s
WASM	12s
docker image smoke test	43s
smoke-test-binaries (ubuntu-22.04, opa_linux_amd64)	20s
smoke-test-binaries (ubuntu-22.04, opa_linux_amd64_static, disabled)	20s
smoke-test-binaries (macos-latest, opa_darwin_amd64)	30s
smoke-test-binaries (windows-latest, opa_windows_amd64.exe)	1m 29s
	1h 1m 7s

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