fix: only csv do timestamp parse

[vagetablechicken]

Closes #1421

[github-actions]

Linux Test Report

     112 files       238 suites   45m 26s ⏱️
  8 623 tests   8 620 ✔️ 3 💤 0 ❌
12 755 runs  12 752 ✔️ 3 💤 0 ❌

Results for commit f6ce4b6.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Merging #1422 (f6ce4b6) into main (145d048) will decrease coverage by 0.00%.
The diff coverage is 85.71%.

@@             Coverage Diff              @@
##               main    #1422      +/-   ##
============================================
- Coverage     65.54%   65.54%   -0.01%     
  Complexity      236      236              
============================================
  Files           571      571              
  Lines        107131   107133       +2     
  Branches        859      863       +4     
============================================
- Hits          70223    70220       -3     
- Misses        36756    36761       +5     
  Partials        152      152              

Impacted Files	Coverage Δ
..._4paradigm/openmldb/batch/nodes/LoadDataPlan.scala	59.25% <85.71%> (+0.76%)	⬆️
src/replica/log_replicator.cc	77.19% <0.00%> (-0.66%)	⬇️
src/sdk/db_sdk.cc	63.63% <0.00%> (-0.61%)	⬇️
hybridse/src/planv2/ast_node_converter.cc	94.17% <0.00%> (-0.16%)	⬇️
src/tablet/tablet_impl.cc	37.99% <0.00%> (-0.09%)	⬇️
src/nameserver/name_server_impl.cc	37.58% <0.00%> (-0.03%)	⬇️
hybridse/include/base/spin_lock.h	100.00% <0.00%> (+33.33%)	⬆️

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