refactor(batch): simplify scan_range literal casting

[xiangjinwu]

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What's changed and what's your intention?

Simplify the auxiliary function introduced in #3470.

The Preferred solution is to do this type alignment in frontend: #3479 #3478

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

Merging #3486 (a0aafa1) into main (e37f2b6) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##             main    #3486   +/-   ##
=======================================
  Coverage   74.42%   74.43%           
=======================================
  Files         769      769           
  Lines      107522   107511   -11     
=======================================
- Hits        80025    80023    -2     
+ Misses      27497    27488    -9     

Flag	Coverage Δ
rust	74.43% <0.00%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
src/batch/src/executor/row_seq_scan.rs	16.56% <0.00%> (+1.08%)	⬆️
src/meta/src/manager/id.rs	95.50% <0.00%> (-0.57%)	⬇️
src/connector/src/filesystem/file_common.rs	80.35% <0.00%> (-0.45%)	⬇️

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[liurenjie1024]

LGTM