[BEAM-13761] consistent namings for expansion address in Debezium IO

[riteshghorse]

Change namings for expansion service address in Debezium IO wrapper in Go SDK.

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ValidatesRunner compliance status (on master branch)

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---					---
Java
Python	---					---
XLang						---

Examples testing status on various runners

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---	---	---	---	---	---	---
Java	---		---	---	---	---	---
Python	---	---	---	---	---	---	---
XLang	---	---	---	---	---	---	---

Post-Commit SDK/Transform Integration Tests Status (on master branch)

Go	Java	Python

Pre-Commit Tests Status (on master branch)

---	Java	Python	Go	Website	Whitespace	Typescript
Non-portable
Portable	---			---	---	---

See .test-infra/jenkins/README for trigger phrase, status and link of all Jenkins jobs.

GitHub Actions Tests Status (on master branch)

See CI.md for more information about GitHub Actions CI.

[riteshghorse]

Run Go PostCommit

[codecov]

Codecov Report

Merging #16766 (6eb8c66) into master (6595861) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #16766      +/-   ##
==========================================
- Coverage   46.49%   46.49%   -0.01%     
==========================================
  Files         202      202              
  Lines       19938    19940       +2     
==========================================
  Hits         9271     9271              
- Misses       9677     9679       +2     
  Partials      990      990              

Impacted Files	Coverage Δ
sdks/go/pkg/beam/runners/dataflow/dataflow.go	5.21% <0.00%> (-0.10%)	⬇️

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[riteshghorse]

R: @lostluck @youngoli