Extend alter table query templates with enable auto split

[antonkovalenko]

Every time users need to enable auto partitioning by load we have to search required queries on the internets.

Let's introduce second level under alter table and add two options:

• Rename, Manage columns -> this menu item fills the editor with current query template, available under alter table command
• Manage auto partitioning -> this one fills the editor with the query template written below.

Query template for manage partitioning

-- documentation about partitioning https://ydb.tech/docs/en/concepts/datamodel/table#partitioning

ALTER TABLE `category` SET 
(
    AUTO_PARTITIONING_BY_LOAD = ENABLED, -- If a partition consumes more than 50% of the CPU for a few dozens of seconds, it is enqueued for splitting.
    AUTO_PARTITIONING_BY_SIZE = ENABLED, --  If a partition size exceeds the value specified by the AUTO_PARTITIONING_PARTITION_SIZE_MB  parameter, it is enqueued for splitting.
    AUTO_PARTITIONING_PARTITION_SIZE_MB = 2048,
    AUTO_PARTITIONING_MIN_PARTITIONS_COUNT = 10, -- Partitions are merged only if their actual number exceeds the value specified by this parameter.
    AUTO_PARTITIONING_MAX_PARTITIONS_COUNT = 100 -- Partitions are split only if their number doesn't exceed the value specified by this parameter.
)

[antonkovalenko]

Should be considered a part of the epic
#911