Fix OpenTelemetry graceful shutdown. #10211

Job	Run time
Go Lint	1m 38s
Generate Code	1m 10s
YAML Lint	16s
Rego PR checks	1m 28s
Go Build (linux amd64)	2m 37s
Check Generated	23s
Go Build (linux arm64)	2m 23s
Go compat build/test (ubuntu-22.04, 1.20)	2m 35s
Go Test (linux)	4m 36s
Go Build (linux arm64GO_TAGS="-tags=opa_no_oci")	2m 8s
Go compat build/test (macos-14, 1.20)	3m 26s
Go Test (darwin)	3m 39s
Go Build (windows amd64)	2m 41s
Go Race Detector	6m 7s
Go Build (darwin amd64)	1m 10s
WASM	14s
Go Build (darwin arm64)	30s
docker image smoke test	44s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64, amd64)	12s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64_static, amd64, disabled)	13s
smoke-test-binaries (darwin, macos-13, opa_darwin_amd64, amd64)	33s
smoke-test-binaries (darwin, macos-14, opa_darwin_arm64_static, arm64, disabled)	17s
smoke-test-binaries (windows, windows-latest, opa_windows_amd64.exe, amd64)	40s
	39m 40s

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