chore: remove v2beta3

[tao12345666333]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches
• Documentation
• Refactor
• Chore
• CI/CD or Tests

What this PR does / why we need it:

follow up #707

remove v2beta3 API version

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[codecov-commenter]

Codecov Report

Merging #1817 (cdab4f0) into master (31891ba) will increase coverage by 0.35%.
The diff coverage is n/a.

❗ Current head cdab4f0 differs from pull request most recent head 3ace70d. Consider uploading reports for the commit 3ace70d to get more accurate results

@@            Coverage Diff             @@
##           master    #1817      +/-   ##
==========================================
+ Coverage   39.45%   39.80%   +0.35%     
==========================================
  Files          91       91              
  Lines        8043     7258     -785     
==========================================
- Hits         3173     2889     -284     
+ Misses       4463     3985     -478     
+ Partials      407      384      -23     

Impacted Files	Coverage Δ
pkg/config/config.go	64.64% <ø> (ø)
...viders/apisix/translation/apisix_cluster_config.go	100.00% <ø> (ø)
...kg/providers/apisix/translation/apisix_consumer.go	63.15% <ø> (-2.06%)	⬇️
pkg/providers/apisix/translation/apisix_plugin.go	85.02% <ø> (+26.95%)	⬆️
...roviders/apisix/translation/apisix_pluginconfig.go	50.00% <ø> (+20.27%)	⬆️
pkg/providers/apisix/translation/apisix_route.go	39.87% <ø> (+8.73%)	⬆️
pkg/providers/apisix/translation/apisix_ssl.go	0.00% <ø> (ø)
pkg/providers/apisix/translation/translator.go	0.00% <ø> (ø)
pkg/providers/translation/apisix_upstream.go	79.49% <ø> (-0.46%)	⬇️
pkg/providers/translation/service.go	18.75% <ø> (+5.37%)	⬆️
... and 1 more

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