Enable publish servicedefinition to metadata center

[Leospard]

What this PR does:

Which issue(s) this PR fixes:
fix zk invalid path when metadata-type: remote

You should pay attention to items below to ensure your pr passes our ci test
We do not merge pr with ci tests failed

• All ut passed (run 'go test ./...' in project root)
• After go-fmt ed , run 'go fmt project' using goland.
• Golangci-lint passed, run 'sudo golangci-lint run' in project root.
• After import formatted, (using imports-formatter to run 'imports-formatter .' in project root, to format your import blocks, mentioned in CONTRIBUTING.md above)
• Your new-created file needs to have apache license at the top, like other existed file does.
• All integration test passed. You can run integration test locally (with docker env). Clone our dubbo-go-samples project and replace the go.mod to your dubbo-go, and run 'sudo sh start_integration_test.sh' at root of samples project root. (M1 Slice is not Support)

[codecov-commenter]

Codecov Report

Merging #2025 (b2e2641) into 3.0 (d924219) will decrease coverage by 0.24%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              3.0    #2025      +/-   ##
==========================================
- Coverage   44.84%   44.60%   -0.25%     
==========================================
  Files         283      283              
  Lines       17150    17111      -39     
==========================================
- Hits         7691     7632      -59     
- Misses       8648     8672      +24     
+ Partials      811      807       -4     

Impacted Files	Coverage Δ
metadata/definition/definition.go	70.66% <ø> (-1.06%)	⬇️
metadata/identifier/base_metadata_identifier.go	86.48% <0.00%> (-7.75%)	⬇️
metadata/report/delegate/delegate_report.go	26.49% <0.00%> (-8.61%)	⬇️
cluster/cluster/base/cluster_invoker.go	24.44% <0.00%> (-13.34%)	⬇️
cluster/loadbalance/ringhash/ring.go	84.50% <0.00%> (-2.82%)	⬇️
metrics/prometheus/reporter.go	31.79% <0.00%> (+1.53%)	⬆️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[AlexStocks]

@Leospard 如果这个工作做完，准备好让大家review，请把 title 中的 WIP 去掉

[baerwang]

string change strings.Builder?