[core] Fix ray util bazel build files

[dentiny]

Description

Current bazel BUILD file rules is completely a messy, should split all targets:

ray/src/ray/util/BUILD

Lines 3 to 40 in 5e42bdd

	ray_cc_library(
	name = "util",
	srcs = glob(
	[
	"*.cc",
	],
	exclude = [
	"*_test.cc",
	],
	),
	hdrs = glob([
	"*.h",
	]),
	linkopts = select({
	"@platforms//os:windows": [],
	"//conditions:default": ["-lpthread"],
	}),
	deps = [
	":thread_checker",
	"//:aligned_alloc",
	"//:sha256",
	"//src/ray/protobuf:event_cc_proto",
	"//src/ray/protobuf:export_event_cc_proto",
	"@boost//:asio",
	"@com_github_spdlog//:spdlog",
	"@com_google_absl//absl/container:flat_hash_map",
	"@com_google_absl//absl/container:flat_hash_set",
	"@com_google_absl//absl/debugging:failure_signal_handler",
	"@com_google_absl//absl/debugging:stacktrace",
	"@com_google_absl//absl/debugging:symbolize",
	"@com_google_absl//absl/random",
	"@com_google_absl//absl/synchronization",
	"@com_google_absl//absl/time",
	"@com_google_googletest//:gtest_main",
	"@com_google_protobuf//:protobuf",
	"@nlohmann_json",
	],
	)

Use case

No response

[dentiny]

Mostly addressed with #49938, will followup with other cleanup PRs.