enhance: storage v2 clang format version 12

[shaoting-huang]

change storage v2 clang-format version from 14 to 12 to match with Milvus.
related: #39173

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[codecov]

Codecov Report

Attention: Patch coverage is 62.85714% with 13 lines in your changes missing coverage. Please review.

Project coverage is 80.55%. Comparing base (de02a3e) to head (671ca7b).
Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/core/src/segcore/packed_reader_c.cpp	25.00%	6 Missing ⚠️
internal/core/src/segcore/packed_writer_c.cpp	33.33%	6 Missing ⚠️
internal/core/src/segcore/column_groups_c.cpp	93.75%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #40287       +/-   ##
===========================================
+ Coverage   69.88%   80.55%   +10.67%     
===========================================
  Files         309     1475     +1166     
  Lines       27705   207198   +179493     
===========================================
+ Hits        19362   166916   +147554     
- Misses       8343    34233    +25890     
- Partials        0     6049     +6049     

Components	Coverage Δ
Client	79.21% <ø> (∅)
Core	69.87% <62.85%> (-0.01%)	⬇️
Go	82.35% <ø> (∅)

Files with missing lines	Coverage Δ
internal/core/src/segcore/arrow_fs_c.cpp	90.69% <100.00%> (+0.22%)	⬆️
internal/core/src/segcore/column_groups_c.cpp	94.11% <93.75%> (+0.78%)	⬆️
internal/core/src/segcore/packed_reader_c.cpp	42.55% <25.00%> (-1.64%)	⬇️
internal/core/src/segcore/packed_writer_c.cpp	68.88% <33.33%> (-4.29%)	⬇️

... and 1166 files with indirect coverage changes

[shaoting-huang]

rerun ut

[shaoting-huang]

/run-cpu-e2e

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[shaoting-huang]

/run-cpu-e2e

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[sunby]

/lgtm

[shaoting-huang]

/run-cpu-e2e

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[shaoting-huang]

/run-cpu-e2e

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[shaoting-huang]

/run-cpu-e2e

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[shaoting-huang]

/run-cpu-e2e

[tedxu]

/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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