See also #33787
The parsing delete log is distributed in lots of places, which is not
recommended and hard to maintain.
This PR abstract common parsing logic into `DeleteLog.Parse` method to
unify implementation and make it easier to replace json parsing lib.
Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
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Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
