enhance: Support auto index for scalar index

[xiaocai2333]

issue: #29309
master pr: #31255

[mergify]

@xiaocai2333

Invalid PR Title Format Detected

Your PR submission does not adhere to our required standards. To ensure clarity and consistency, please meet the following criteria:

1. Title Format: The PR title must begin with one of these prefixes:

• feat: for introducing a new feature.
• fix: for bug fixes.
• enhance: for improvements to existing functionality.
• test: for add tests to existing functionality.
• doc: for modifying documentation.
• auto: for the pull request from bot.

2. Description Requirement: The PR must include a non-empty description, detailing the changes and their impact.

Required Title Structure:

[Type]: [Description of the PR]

Where Type is one of feat, fix, enhance, test or doc.

Example:

enhance: improve search performance significantly 

Please review and update your PR to comply with these guidelines.

[codecov]

Codecov Report

Attention: Patch coverage is 85.18519% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 80.82%. Comparing base (f1a108c) to head (c3258f1).
Report is 8 commits behind head on 2.4.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #31593      +/-   ##
==========================================
+ Coverage   80.80%   80.82%   +0.02%     
==========================================
  Files         965      969       +4     
  Lines      136613   136701      +88     
==========================================
+ Hits       110389   110489     +100     
+ Misses      22508    22500       -8     
+ Partials     3716     3712       -4     

Files	Coverage Δ
internal/proxy/util.go	89.55% <ø> (-0.06%)	⬇️
pkg/util/indexparamcheck/conf_adapter_mgr.go	100.00% <100.00%> (ø)
pkg/util/indexparamcheck/index_type.go	100.00% <ø> (ø)
pkg/util/indexparamcheck/inverted_checker.go	100.00% <100.00%> (ø)
pkg/util/indexparamcheck/scalar_index_checker.go	100.00% <100.00%> (ø)
pkg/util/indexparamcheck/stl_sort_checker.go	100.00% <100.00%> (ø)
pkg/util/indexparamcheck/trie_checker.go	100.00% <100.00%> (ø)
internal/proxy/task_index.go	77.18% <86.36%> (+2.35%)	⬆️
pkg/util/indexparamcheck/auto_index_checker.go	33.33% <33.33%> (ø)
pkg/util/paramtable/autoindex_param.go	89.06% <80.00%> (-4.92%)	⬇️

... and 23 files with indirect coverage changes

[mergify]

@xiaocai2333 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[xiaocai2333]

/run-cpu-e2e

[mergify]

@xiaocai2333 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[xiaocai2333]

/run-cpu-e2e

[mergify]

@xiaocai2333 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[xiaocai2333]

/run-cpu-e2e

[czs007]

/approve
/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: czs007, xiaocai2333

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• internal/proxy/OWNERS [czs007]
• pkg/util/OWNERS [czs007]
• tests/OWNERS [czs007]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment