[FEATURE] Calcite Engine: Support timestamp type

[qianheng-aws]

Is your feature request related to a problem?
OpenSearch timestamp type is different from other databases including Calcite.

In Calcite, timestamp is calculated as long while don't support nanos precision.

In OpenSearch, timestamp is calculated as string and support nanos precision. In V2, we support comparison between string and columns of timestamp type, and timestamp related functions also support pass in string as its arguments.

What solution would you like?
Convert opensearch timestamp as UDT instead of calcite's timestamp

What alternatives have you considered?
A clear and concise description of any alternative solutions or features you've considered.

Do you have any additional context?
Add any other context or screenshots about the feature request here.