build(deps): upgrade github.com/dgraph-io/badger to v4 #11404

Job	Run time
Generate Code	1m 10s
YAML Lint	18s
Go Lint	1m 58s
Rego PR checks	1m 27s
WASM	10s
Check Generated	33s
Go Test (linux)	5m 3s
Go Build (linux amd64)	2m 23s
Go compat build/test (ubuntu-22.04, 1.21)	4m 13s
Go Test (darwin)	4m 37s
Go Build (linux arm64)	2m 4s
Go Race Detector	5m 58s
Go compat build/test (macos-14, 1.21)	4m 43s
Go Build (linux arm64GO_TAGS="-tags=opa_no_oci")	2m 13s
Go Build (windows amd64)	2m 28s
Go Build (darwin amd64)	1m 53s
Go Build (darwin arm64)	59s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64, amd64)	10s
docker image smoke test	28s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64_static, amd64, disabled)	10s
smoke-test-binaries (darwin, macos-13, opa_darwin_amd64, amd64)	20s
smoke-test-binaries (darwin, macos-14, opa_darwin_arm64_static, arm64, disabled)	14s
smoke-test-binaries (windows, windows-latest, opa_windows_amd64.exe, amd64)	1m 4s
	44m 36s

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