fix: shouldn't override the log.file after touch it

[yangby-cryptape]

What problem does this PR solve?

Since #2990, the log service will write logs into log.dir + log.file.
But the log.file is overridden to log.dir + log.file after touch.
Then the log service will write logs into log.dir + log.dir + log.file.

Related changes

• Need to cherry-pick to the rc/v0.100 release branch

Check List

Tests

• Manual test

  • Test Case 1
    • ckb init -C /tmp/ckb-dir
    • ckb run -C /tmp/ckb-dir
    • cat /tmp/ckb-dir/data/logs/run.log
    • ckb miner -C /tmp/ckb-dir
    • cat /tmp/ckb-dir/data/logs/miner.log
  • Test Case 2
    • cd /tmp
    • ckb init -C ckb-dir
    • ckb run -C ckb-dir
    • cat ckb-dir/data/logs/run.log
    • ckb miner -C ckb-dir
    • cat ckb-dir/data/logs/miner.log
  • Test Case 3
    • cd /tmp
    • ckb init -C ckb-dir
    • cd ckb-dir
    • ckb run -C .
    • cat data/logs/run.log
    • ckb miner -C .
    • cat data/logs/miner.log

Release note

Title Only: Include only the PR title in the release note.

[doitian]

bors r=doitian,driftluo

[bors]

Build succeeded:

• ci