Support group concat function

[Jasmine-ge]

Calculates a concatenated string from a group of strings, optionally separated by a delimiter, and optionally limited by a maximum number of elements.

Syntax
group_concat (expression [, delimiter [, limit ] ])

Arguments

• expression — The expression or column name that outputs strings to be concatenated.
• delimiter — A string that will be used to separate concatenated values. This parameter is optional and defaults to an empty string or delimiter from parameters if not specified.

Parameters

• delimiter — A string that will be used to separate concatenated values. This parameter is optional and defaults to an empty string if not specified.
• limit — A positive integer specifying the maximum number of elements to concatenate. If more elements are present, excess elements are ignored. This parameter is optional.

Returned value

• Returns a string consisting of the concatenated values of the column or expression. If the group has no elements or only null elements, and the function does not specify a handling for only null values, the result is a nullable string with a null value.

Please write user-readable short description of the changes:
Port CH PRs and update the obvious refactor (utils, format, etc):
ClickHouse/ClickHouse#65009
ClickHouse/ClickHouse#69455
ClickHouse/ClickHouse#72540

close #889

[CLAassistant]

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