chore: rename all v2beta3 to v2 in e2e templates

[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 #1817
rename all v2beta3 to v2

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 #1832 (ec03806) into master (050d201) will not change coverage.
The diff coverage is n/a.

❗ Current head ec03806 differs from pull request most recent head 114a07e. Consider uploading reports for the commit 114a07e to get more accurate results

@@           Coverage Diff           @@
##           master    #1832   +/-   ##
=======================================
  Coverage   39.80%   39.80%           
=======================================
  Files          91       91           
  Lines        7258     7258           
=======================================
  Hits         2889     2889           
  Misses       3985     3985           
  Partials      384      384           

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