fix: Refine index param check for Create/Alter Index

[congqixia]

See also #32711

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.77%. Comparing base (a43baa0) to head (73329c4). Report is 10 commits behind head on master.

Additional details and impacted files

[](https://app.codecov.io/gh/milvus-io/milvus/pull/32712?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=milvus-io) ```diff @@ Coverage Diff @@ ## master #32712 +/- ## ======================================= Coverage 81.77% 81.77% ======================================= Files 998 998 Lines 124209 124201 -8 ======================================= - Hits 101566 101561 -5 + Misses 18780 18777 -3 Partials 3863 3863 ``` | [Files](https://app.codecov.io/gh/milvus-io/milvus/pull/32712?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=milvus-io) | Coverage Δ | | |---|---|---| | [internal/datacoord/index\_service.go](https://app.codecov.io/gh/milvus-io/milvus/pull/32712?src=pr&el=tree&filepath=internal%2Fdatacoord%2Findex_service.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=milvus-io#diff-aW50ZXJuYWwvZGF0YWNvb3JkL2luZGV4X3NlcnZpY2UuZ28=) | `94.91% <100.00%> (+0.91%)` | :arrow_up: | | [internal/datacoord/indexnode\_manager.go](https://app.codecov.io/gh/milvus-io/milvus/pull/32712?src=pr&el=tree&filepath=internal%2Fdatacoord%2Findexnode_manager.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=milvus-io#diff-aW50ZXJuYWwvZGF0YWNvb3JkL2luZGV4bm9kZV9tYW5hZ2VyLmdv) | `90.14% <100.00%> (-0.28%)` | :arrow_down: | ... and [25 files with indirect coverage changes](https://app.codecov.io/gh/milvus-io/milvus/pull/32712/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=milvus-io)

[xiaocai2333]

/lgtm