feat: generate v1 client

[Neenu1995]

No description provided.

[generated-files-bot]

Warning: This pull request is touching the following templated files:

• .github/sync-repo-settings.yaml
• .kokoro/release/snapshot.sh
• .kokoro/release/stage.sh

[codecov]

Codecov Report

Merging #421 (489d3a4) into master (acc7406) will increase coverage by 0.77%.
The diff coverage is 71.22%.

❗ Current head 489d3a4 differs from pull request most recent head 47a6a50. Consider uploading reports for the commit 47a6a50 to get more accurate results

@@             Coverage Diff              @@
##             master     #421      +/-   ##
============================================
+ Coverage     68.58%   69.35%   +0.77%     
- Complexity      122      173      +51     
============================================
  Files            18       24       +6     
  Lines           850     1201     +351     
  Branches          4        6       +2     
============================================
+ Hits            583      833     +250     
- Misses          259      354      +95     
- Partials          8       14       +6     

Impacted Files	Coverage Δ	Complexity Δ
...cumentai/v1/stub/DocumentProcessorServiceStub.java	14.28% <14.28%> (ø)	1.00 <1.00> (?)
...ocumentai/v1/DocumentProcessorServiceSettings.java	17.50% <17.50%> (ø)	2.00 <2.00> (?)
...b/GrpcDocumentProcessorServiceCallableFactory.java	50.00% <50.00%> (ø)	4.00 <4.00> (?)
.../documentai/v1/DocumentProcessorServiceClient.java	52.94% <52.94%> (ø)	19.00 <19.00> (?)
.../v1/stub/DocumentProcessorServiceStubSettings.java	84.86% <84.86%> (ø)	14.00 <14.00> (?)
...ntai/v1/stub/GrpcDocumentProcessorServiceStub.java	88.17% <88.17%> (ø)	11.00 <11.00> (?)
... and 2 more

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