Fix the issue that slow log position not change with LogDir

[lucklove]

Fix #1440

What problem does this PR solve?

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

[codecov-commenter]

Codecov Report

Merging #1441 (ef9e9b5) into master (2bba748) will decrease coverage by 3.57%.
The diff coverage is n/a.

❗ Current head ef9e9b5 differs from pull request most recent head b582367. Consider uploading reports for the commit b582367 to get more accurate results

@@            Coverage Diff             @@
##           master    #1441      +/-   ##
==========================================
- Coverage   25.23%   21.65%   -3.58%     
==========================================
  Files         264      165      -99     
  Lines       20745    14571    -6174     
==========================================
- Hits         5235     3156    -2079     
+ Misses      14707    10707    -4000     
+ Partials      803      708      -95     

Flag	Coverage Δ
integrate	21.65% <ø> (+6.23%)	⬆️
playground	13.70% <ø> (?)
tiup	15.42% <ø> (ø)
unittest	?

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

Impacted Files	Coverage Δ
embed/embed.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/cluster/spec/validate.go	0.00% <0.00%> (-89.97%)	⬇️
pkg/cluster/executor/checkpoint.go	0.00% <0.00%> (-82.61%)	⬇️
pkg/utils/diff.go	0.00% <0.00%> (-82.50%)	⬇️
pkg/meta/err.go	0.00% <0.00%> (-81.25%)	⬇️
pkg/cluster/api/error.go	0.00% <0.00%> (-80.00%)	⬇️
pkg/cluster/spec/parse_topology.go	0.00% <0.00%> (-78.47%)	⬇️
pkg/telemetry/node_info.go	0.00% <0.00%> (-73.34%)	⬇️
pkg/telemetry/scrub.go	0.00% <0.00%> (-66.67%)	⬇️
pkg/utils/error.go	0.00% <0.00%> (-63.64%)	⬇️
... and 180 more

---

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[9547]

/lgtm

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: b582367