fix(oci): dont use preparing client for docker authorizer #11246

Job	Run time
Generate Code	1m 16s
YAML Lint	19s
Rego PR checks	1m 30s
Go Lint	1m 54s
Check Generated	27s
WASM	10s
Go Build (linux amd64)	2m 24s
Go Test (linux)	4m 2s
Go Build (linux arm64)	2m 13s
Go compat build/test (ubuntu-22.04, 1.21)	3m 31s
Go Test (darwin)	4m 30s
Go Race Detector	5m 50s
Go Build (linux arm64GO_TAGS="-tags=opa_no_oci")	2m 10s
Go compat build/test (macos-14, 1.21)	4m 20s
Go Build (windows amd64)	2m 17s
Go Build (darwin amd64)	1m 26s
Go Build (darwin arm64)	51s
docker image smoke test	25s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64, amd64)	11s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64_static, amd64, disabled)	9s
smoke-test-binaries (darwin, macos-13, opa_darwin_amd64, amd64)	23s
smoke-test-binaries (darwin, macos-14, opa_darwin_arm64_static, arm64, disabled)	16s
smoke-test-binaries (windows, windows-latest, opa_windows_amd64.exe, amd64)	50s
	41m 24s

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