feat: support enable/disable mmap for index

[yah01]

support enable/disable mmap for index, the user could alter the index's mode by AlterIndex method
related: #21866

[mergify]

@yah01 ut workflow job failed, comment rerun ut can trigger the job again.

[xiaocai2333]

/lgtm about index meta

[codecov]

Codecov Report

Attention: 92 lines in your changes are missing coverage. Please review.

Comparison is base (7d32861) 80.72% compared to head (e852b82) 80.72%.
Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #29005    +/-   ##
========================================
  Coverage   80.72%   80.72%            
========================================
  Files         912      912            
  Lines      126296   126606   +310     
========================================
+ Hits       101951   102203   +252     
- Misses      21008    21059    +51     
- Partials     3337     3344     +7     

Files	Coverage Δ
internal/datacoord/index_service.go	94.77% <100.00%> (-0.18%)	⬇️
internal/distributed/datacoord/client/client.go	96.18% <100.00%> (-1.15%)	⬇️
internal/distributed/datacoord/service.go	87.70% <100.00%> (+0.10%)	⬆️
internal/proxy/util.go	91.16% <100.00%> (-0.23%)	⬇️
internal/querynodev2/segments/load_index_info.go	69.47% <100.00%> (+1.69%)	⬆️
internal/querynodev2/segments/segment.go	77.00% <100.00%> (ø)
internal/querynodev2/segments/segment_loader.go	72.69% <100.00%> (ø)
pkg/util/indexparams/index_params.go	87.69% <100.00%> (+0.25%)	⬆️
pkg/util/merr/errors.go	85.71% <ø> (ø)
internal/distributed/proxy/service.go	82.60% <0.00%> (+0.88%)	⬆️
... and 7 more

... and 23 files with indirect coverage changes

[xiaofan-luan]

/approve

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[mergify]

@yah01 Thanks for your contribution. Please submit with DCO, see the contributing guide https://github.com/milvus-io/milvus/blob/master/CONTRIBUTING.md#developer-certificate-of-origin-dco.

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@yah01 ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[yah01]

/run-cpu-e2e

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[mergify]

@yah01 ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[mergify]

@yah01 ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[mergify]

@yah01 ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[yah01]

/run-cpu-e2e

[xiaofan-luan]

/lgtm
/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: xiaofan-luan, yah01

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