[FLINK-39680][FLINK-21378] Supports unaligned checkpoint on pointwise edges

[pltbkd]

What is the purpose of the change

This PR enables unaligned checkpoint on pointwise edges when users enable it explicitly, as long as handling the channel state recovery of pointwise edges.
The two issues are combined because neither makes sense as an independent change.

Brief change log

• Support unaligned checkpoint on forward edges with force-unaligned option
• Introduce EdgeDistributionPatternHook to store edge patterns for channel mapping calculation during recovery
• Handling channel state redistribution on both JM and TM sides for pointwise edges

Verifying this change

This change is covered by existing unaligned checkpoint IT cases, because the original topologies contain pointwise edges and the jobs are already set FORCE_UNALIGNED.
This change also added an IT case that covers all parallelism and edge pattern changes on pointwise edges.

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: yes
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? not applicable

[flinkbot]

CI report:

• 62b7f9c Azure: FAILURE

Bot commands

The @flinkbot bot supports the following commands:

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