Add config for disable BF load

[xiaofan-luan]

see also #22994
Signed-off-by: xiaofan-luan xiaofan.luan@zilliz.com

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[mergify]

@xiaofan-luan ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

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

[codecov]

Codecov Report

Merging #22997 (70d602b) into 2.2.0 (cb11abe) will decrease coverage by 0.02%.
The diff coverage is 38.46%.

@@            Coverage Diff             @@
##            2.2.0   #22997      +/-   ##
==========================================
- Coverage   80.96%   80.95%   -0.02%     
==========================================
  Files         717      717              
  Lines      100518   100531      +13     
==========================================
- Hits        81387    81382       -5     
- Misses      15969    15978       +9     
- Partials     3162     3171       +9     

Impacted Files	Coverage Δ
internal/querynode/segment_loader.go	80.45% <0.00%> (-0.57%)	⬇️
internal/querynode/segment.go	80.22% <20.00%> (-0.43%)	⬇️
internal/util/paramtable/component_param.go	87.73% <100.00%> (+0.05%)	⬆️

... and 12 files with indirect coverage changes

[czs007]

/lgtm