enhance: Use mmap.scalarIndex config for text index

[bigsheeper]

issue: #35273

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[mergify]

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

[codecov]

Codecov Report

Attention: Patch coverage is 61.53846% with 5 lines in your changes missing coverage. Please review.

Project coverage is 73.40%. Comparing base (eb23e23) to head (68f55eb).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/core/src/storage/Types.h	50.00%	2 Missing ⚠️
internal/core/src/storage/storage_c.cpp	0.00%	2 Missing ⚠️
internal/core/src/segcore/SegmentSealedImpl.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #36400      +/-   ##
==========================================
- Coverage   82.34%   73.40%   -8.94%     
==========================================
  Files        1277     1277              
  Lines      150744   150746       +2     
==========================================
- Hits       124126   110654   -13472     
- Misses      21632    35110   +13478     
+ Partials     4986     4982       -4     

Files with missing lines	Coverage Δ
internal/util/initcore/init_core.go	87.41% <100.00%> (ø)
internal/core/src/segcore/SegmentSealedImpl.cpp	0.00% <0.00%> (-75.54%)	⬇️
internal/core/src/storage/Types.h	22.66% <50.00%> (-17.88%)	⬇️
internal/core/src/storage/storage_c.cpp	0.00% <0.00%> (-73.44%)	⬇️

... and 244 files with indirect coverage changes