Replace faiss::MetricType with knowhere::MetricType

[cydrain]

Signed-off-by: yudong.cai yudong.cai@zilliz.com
Issue: #17599 #17890

[mergify]

@cydrain ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

@cydrain E2e jenkins job failed, comment /run-checks can trigger the job again.

[longjiquan]

/lgtm

[codecov]

Codecov Report

Merging #17891 (85c9cc0) into master (6b79d4f) will increase coverage by 0.00%.
The diff coverage is 80.76%.

@@           Coverage Diff           @@
##           master   #17891   +/-   ##
=======================================
  Coverage   81.11%   81.11%           
=======================================
  Files         472      472           
  Lines       74955    74927   -28     
=======================================
- Hits        60796    60780   -16     
+ Misses      11480    11469   -11     
+ Partials     2679     2678    -1     

Impacted Files	Coverage Δ
internal/core/src/indexbuilder/VecIndexCreator.h	100.00% <ø> (ø)
internal/core/src/query/PlanNode.h	100.00% <ø> (ø)
internal/core/src/query/PlanProto.cpp	86.28% <ø> (ø)
internal/core/src/query/helper.h	100.00% <ø> (ø)
...al/core/src/query/visitors/ShowPlanNodeVisitor.cpp	85.71% <ø> (-1.25%)	⬇️
internal/core/src/segcore/plan_c.cpp	60.00% <ø> (-0.61%)	⬇️
internal/core/src/query/SearchBruteForce.cpp	72.34% <44.44%> (-2.66%)	⬇️
internal/core/src/common/FieldMeta.h	83.33% <100.00%> (ø)
internal/core/src/common/Schema.cpp	75.00% <100.00%> (ø)
internal/core/src/common/Schema.h	90.24% <100.00%> (ø)
... and 45 more

[congqixia]

/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, cydrain

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