bench: fix wrong woakload loading

[Smityz]

What problem does this PR solve?

readproportion must be set to 0 by default here, otherwise we can't load workload correctly

tiup/components/bench/ycsb.go

Lines 85 to 90 in 9060112

	// these config are always included in the config file
	// should be overwritten if they are passed through the command line
	if config.ReadProportion != 0 {
	// we don't need to check errors since we disabled expansion
	_, _, _ = result.Set("readproportion", fmt.Sprint(config.ReadProportion))
	}

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot]

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• srstack

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[Smityz]

@srstack Can you help me to check this PR?
I introduce this bug in #1807

[codecov-commenter]

Codecov Report

Merging #1827 (0c5aa04) into master (762dd94) will decrease coverage by 0.01%.
The diff coverage is n/a.

❗ Current head 0c5aa04 differs from pull request most recent head 755a280. Consider uploading reports for the commit 755a280 to get more accurate results

@@            Coverage Diff             @@
##           master    #1827      +/-   ##
==========================================
- Coverage   52.61%   52.60%   -0.01%     
==========================================
  Files         306      306              
  Lines       34986    34986              
==========================================
- Hits        18405    18401       -4     
- Misses      14420    14423       +3     
- Partials     2161     2162       +1     

Flag	Coverage Δ
playground	12.79% <ø> (ø)
tiup	14.44% <ø> (-0.02%)	⬇️
unittest	21.26% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/repository/store/txn.go	56.91% <0.00%> (-2.13%)	⬇️

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[srstack]

why not modify here？

tiup/components/bench/ycsb.go

Lines 85 to 90 in 9060112

	// these config are always included in the config file
	// should be overwritten if they are passed through the command line
	if config.ReadProportion != 0 {
	// we don't need to check errors since we disabled expansion
	_, _, _ = result.Set("readproportion", fmt.Sprint(config.ReadProportion))
	}

[AstroProfundis]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: b073c3f