[FLINK-24696][docs-zh]Translate how to configure unaligned checkpoints into Chinese

[Libra-JL]

What is the purpose of the change

As part of FLINK-24695 docs/content/docs/ops/state/checkpointing_under_backpressure.md and docs/content/docs/dev/datastream/fault-tolerance/checkpointing.md were modified. Those modifications should be translated into Chinese

Brief change log

• translate 'docs/content/docs/ops/state/checkpointing_under_backpressure.md' and 'docs/content/docs/dev/datastream/fault-tolerance/checkpointing.md'

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented?no

[flinkbot]

CI report:

• e7b37ded47c4dc75e342daee6d72244ed86843f0 Azure: SUCCESS

Bot commands

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• @flinkbot run azure re-run the last Azure build

[Zakelly]

@Libra-JL Thanks for you update! I noticed that there still some format change in docs/layouts/shortcodes/generated/checkpointing_configuration.html, would you please remove them?

[Libra-JL]

@Libra-JL Thanks for you update! I noticed that there still some format change in docs/layouts/shortcodes/generated/checkpointing_configuration.html, would you please remove them?

Sorry, I forgot what the original format should look like. I did the following: I replaced this with the latest file from the master branch，because this file is not a translation requested by the issue