enhance: record memory size (uncompressed) item for index

[chyezh]

issue: #38715
pr: #38770

• Current milvus use a serialized index size(compressed) for estimate resource for loading.
• Add a new field MemSize (before compressing) for index to estimate resource.

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: chyezh
To complete the pull request process, please assign liliu-z after the PR has been reviewed.
You can assign the PR to them by writing /assign @liliu-z in a comment when ready.

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

Needs approval from an approver in each of these files:

• OWNERS

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

[mergify]

@chyezh cpp-unit-test check failed, comment rerun cpp-unit-test can trigger the job again.

[chyezh]

rerun cpp-unit-test

[chyezh]

rerun ut

[mergify]

@chyezh cpp-unit-test check failed, comment rerun cpp-unit-test can trigger the job again.

[codecov]

Codecov Report

Attention: Patch coverage is 59.40594% with 41 lines in your changes missing coverage. Please review.

Project coverage is 69.43%. Comparing base (ef40022) to head (3a28afd).
Report is 9 commits behind head on 2.5.

Files with missing lines	Patch %	Lines
internal/core/src/index/CreateIndexResult.cpp	68.75%	10 Missing ⚠️
internal/core/src/index/TextMatchIndex.cpp	0.00%	8 Missing ⚠️
internal/core/src/common/protobuf_utils.cpp	50.00%	6 Missing ⚠️
internal/core/src/indexbuilder/index_c.cpp	0.00%	6 Missing ⚠️
internal/core/src/index/StringIndexMarisa.cpp	0.00%	5 Missing ⚠️
internal/core/src/index/ScalarIndexSort.cpp	0.00%	4 Missing ⚠️
internal/core/src/common/protobuf_utils.h	83.33%	1 Missing ⚠️
internal/core/src/storage/DiskFileManagerImpl.cpp	50.00%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (ef40022) and HEAD (3a28afd). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (ef40022)	HEAD (3a28afd)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##              2.5   #38844       +/-   ##
===========================================
- Coverage   81.05%   69.43%   -11.63%     
===========================================
  Files        1383      297     -1086     
  Lines      195501    26501   -169000     
===========================================
- Hits       158466    18400   -140066     
+ Misses      31461     8101    -23360     
+ Partials     5574        0     -5574     

Components	Coverage Δ
Client	∅ <ø> (∅)
Core	69.43% <59.40%> (-0.03%)	⬇️
Go	∅ <ø> (∅)

Files with missing lines	Coverage Δ
internal/core/src/index/BitmapIndex.cpp	81.09% <100.00%> (+0.08%)	⬆️
internal/core/src/index/BitmapIndex.h	44.44% <ø> (ø)
internal/core/src/index/CreateIndexResult.h	100.00% <100.00%> (ø)
internal/core/src/index/HybridScalarIndex.cpp	79.12% <100.00%> (-0.33%)	⬇️
internal/core/src/index/HybridScalarIndex.h	39.02% <ø> (ø)
internal/core/src/index/Index.h	100.00% <ø> (ø)
internal/core/src/index/InvertedIndexTantivy.cpp	92.41% <100.00%> (-0.23%)	⬇️
internal/core/src/index/InvertedIndexTantivy.h	53.84% <ø> (ø)
internal/core/src/index/ScalarIndexSort.h	38.46% <ø> (ø)
internal/core/src/index/StringIndexMarisa.h	71.42% <ø> (ø)
... and 18 more

... and 1090 files with indirect coverage changes