fix(loki.source.file): Make sure position is recorded when component exit

[kalleep]

Pull Request Details

We only update position for a file after some time have passed and when tailer exist. But then we stopped position file before we stopped all tailers so if a file was ingested fast we never stored last read offset.

To fix this we need to stop position after all trailers have been stopped and we need to set lastUpdatedPosition to the start position.

Issue(s) fixed by this Pull Request

Notes to the Reviewer

PR Checklist

• Documentation added
• Tests updated
• Config converters updated

[grafana-alloybot]

⚠️ Automatic backport to release/v1.13 failed

The automatic backport for this PR failed, likely due to merge conflicts. Perform the backport manually:

git fetch origin main release/v1.13
git checkout release/v1.13
git pull
git checkout -b backport/pr-5412-to-v1.13
git cherry-pick -x 79e138d24dccbea6fe87a44bf98360812eb54962
# If conflicts exist, fix them, then:
git add .
git commit
# If no [more] conflicts, then:
git push -u origin backport/pr-5412-to-v1.13

Then create a PR from backport/pr-5412-to-v1.13 to release/v1.13 with the title:

fix(loki.source.file): Make sure position is recorded when component exit [backport]

[grafana-alloybot]

⚠️ Automatic backport to release/v1.13 failed

The automatic backport for this PR failed, likely due to merge conflicts. Perform the backport manually:

git fetch origin main release/v1.13
git checkout release/v1.13
git pull
git checkout -b backport/pr-5412-to-v1.13
git cherry-pick -x 79e138d24dccbea6fe87a44bf98360812eb54962
# If conflicts exist, fix them, then:
git add .
git commit
# If no [more] conflicts, then:
git push -u origin backport/pr-5412-to-v1.13

Then create a PR from backport/pr-5412-to-v1.13 to release/v1.13 with the title:

fix(loki.source.file): Make sure position is recorded when component exit [backport]