fix: update openapi version to 3.0.0

[shanshanying]

• fix [BUG] failed to transform from cuelang to openapischema when exclusiveMinimum field exists for OpenApiSchema #5971
  This is an interesting issue and has been disucssed in
• OpenAPI: exclusiveMinimum/Maximum cuelang/cue#412

The generated ASTFile is incorrect in converting exclusive minimum / maximum.

for exampel, if we use expr >1 in cue, Exected output shoud be:

exclusiveMinimum: true
minimum: int 1

rather than

exclusiveMinimum: 1

As the issues mentioned in cue-lang community has been fixed and we checked out that we shoud use APIVersion '3.0.0' instead of '3.1.0'.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.02%. Comparing base (7d50e69) to head (aa83f25).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6924      +/-   ##
==========================================
+ Coverage   66.00%   66.02%   +0.02%     
==========================================
  Files         333      333              
  Lines       41200    41200              
==========================================
+ Hits        27192    27202      +10     
+ Misses      11679    11672       -7     
+ Partials     2329     2326       -3     

Flag	Coverage Δ
unittests	66.02% <100.00%> (+0.02%)	⬆️

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[shanshanying]

/cherry-pick release-0.8

[github-actions]

🤖 says: Error cherry-picking.

Auto-merging go.mod
CONFLICT (content): Merge conflict in go.mod
Auto-merging go.sum
CONFLICT (content): Merge conflict in go.sum
Auto-merging pkg/configuration/openapi/cue_gen_openapi.go
Auto-merging test/testdata/cue_testdata/mysql_openapi.cue
error: could not apply b088d60... fix: update openapi version to 3.0.0 (#6924)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

[github-actions]

🤖 says: ‼️ cherry pick action failed.
See: https://github.com/apecloud/kubeblocks/actions/runs/8479686986