[FLINK-27241][table] Support DROP PARTITIONS statement for partitioned table

[luoyuxia]

What is the purpose of the change

To make Flink support DROP partition statement for partitioned table.

Brief change log

• support to parse alter table drop partition syntax which will convert the sql statement to a SqlAddPartitions
• create a SqlAlterTableDropPartitionConverter to convert the SqlDropPartitions to DropPartitionsOperation.

Verifying this change

UT

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

• Dependencies (does it add or upgrade a dependency): (yes / no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (yes / no)
• The serializers: (yes / no / don't know)
• The runtime per-record code paths (performance sensitive): (yes / no / don't know)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know)
• The S3 file system connector: (yes / no / don't know)

Documentation

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

[flinkbot]

CI report:

• 8cd8762 Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

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

[ruanhang1993]

LGTM.

[luoyuxia]

@ruanhang1993 Thanks for reviewing. Merging...