[SPARK-55995][SQL] Support TIMESTAMP WITH LOCAL TIME ZONE in SQL syntax

[pan3793]

What changes were proposed in this pull request?

This PR proposes to add SQL syntax TIMESTAMP WITH LOCAL TIME ZONE for TimestampType, as a counterpart of TIMESTAMP WITHOUT TIME ZONE for TimestampNTZType.

Why are the changes needed?

Spark SQL supports TIMESTAMP_LTZ as a counterpart of TIMESTAMP_NTZ, but lacks support
TIMESTAMP WITH LOCAL TIME ZONE as a counterpart of TIMESTAMP WITHOUT TIME ZONE.

-- fine
CREATE TABLE ts_1(ltz TIMESTAMP, ntz TIMESTAMP_NTZ);

-- fine, equivalent to the above case
CREATE TABLE ts_2(ltz TIMESTAMP, ntz TIMESTAMP WITHOUT TIME ZONE);

-- set TIMESTAMP as alias of TIMESTAMP_NTZ
SET spark.sql.timestampType=TimestampNTZ;

-- fine, both are TimestampNTZ
CREATE TABLE ts_3(ltz TIMESTAMP, ntz TIMESTAMP_NTZ);

-- fine, one Timestamp, and one TimestampNTZ
CREATE TABLE ts_4(ltz TIMESTAMP_LTZ, ntz TIMESTAMP_NTZ);

-- this does not work
CREATE TABLE ts_5(ltz TIMESTAMP WITH LOCAL TIME ZONE, ntz TIMESTAMP WITHOUT TIME ZONE);

Does this PR introduce any user-facing change?

This introduces new SQL syntax without breaking backward compatibility.

How was this patch tested?

New UTs are added.

Was this patch authored or co-authored using generative AI tooling?

No.