chore(test): tune datagen range

[zwang28]

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What's changed and what's your intention?

This PR allows to specify start and end of datagen connector to the same value as below:

fields.v.start = 123,
fields.v.end  = 123,

Thus we can get v in range [123, 123].

This PR also remove all set CREATE_COMPACTION_GROUP_FOR_MV to true; from tests, because CREATE_COMPACTION_GROUP_FOR_MV is default to false in production, and none of these tests are designed to test CREATE_COMPACTION_GROUP_FOR_MV in the first place.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

• My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

• My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users)

Release note

If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

[hzxa21]

LGTM

[codecov]

Codecov Report

Merging #12408 (41ccebc) into main (b17569d) will decrease coverage by 0.01%.
Report is 2 commits behind head on main.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main   #12408      +/-   ##
==========================================
- Coverage   69.75%   69.75%   -0.01%     
==========================================
  Files        1424     1424              
  Lines      236313   236310       -3     
==========================================
- Hits       164838   164829       -9     
- Misses      71475    71481       +6     

Flag	Coverage Δ
rust	69.75% <66.66%> (-0.01%)	⬇️

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Files Changed	Coverage Δ
src/risedevtool/src/bin/risedev-docslt.rs	0.00% <0.00%> (ø)
src/common/src/field_generator/numeric.rs	96.81% <100.00%> (ø)

... and 4 files with indirect coverage changes

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