Feat: add grpc provider reference in codes generated by protoc-gen-dubbo

[LaurenceLiZhixin]

What this PR does:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

Codecov Report

Merging #1239 (df2156b) into 1.5 (a10ff4d) will decrease coverage by 7.63%.
The diff coverage is 60.77%.

@@            Coverage Diff             @@
##              1.5    #1239      +/-   ##
==========================================
- Coverage   66.13%   58.49%   -7.64%     
==========================================
  Files         174      272      +98     
  Lines        9343    13242    +3899     
==========================================
+ Hits         6179     7746    +1567     
- Misses       2541     4534    +1993     
- Partials      623      962     +339     

Impacted Files	Coverage Δ
cluster/cluster_impl/available_cluster_invoker.go	66.66% <ø> (-6.67%)	⬇️
cluster/cluster_impl/broadcast_cluster_invoker.go	76.47% <ø> (-3.53%)	⬇️
cluster/cluster_impl/failfast_cluster_invoker.go	66.66% <ø> (-4.77%)	⬇️
cluster/cluster_impl/mock_cluster.go	0.00% <0.00%> (ø)
cluster/loadbalance/random.go	100.00% <ø> (ø)
cluster/router/healthcheck/factory.go	66.66% <0.00%> (ø)
common/extension/auth.go	0.00% <ø> (ø)
common/extension/cluster.go	0.00% <ø> (ø)
common/extension/cluster_interceptor.go	0.00% <0.00%> (ø)
common/extension/config_center.go	0.00% <ø> (ø)
... and 386 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cdae603...df2156b. Read the comment docs.

[zhaoyunxing92]

approved these changes