feat: add timestamp types to max/min function (#511)

This PR add supports for timestamp types in max/min function.

This is currently supported in Acero and I believe most databases
support this as well.

extensions/functions_arithmetic.yaml

@@ -1096,6 +1096,20 @@ aggregate_functions:
  decomposable: MANY
  intermediate: fp64?
  return: fp64?
+ - args:
+ - name: x
+ value: timestamp
+ nullability: DECLARED_OUTPUT
+ decomposable: MANY
+ intermediate: timestamp?
+ return: timestamp?
+ - args:
+ - name: x
+ value: timestamp_tz
+ nullability: DECLARED_OUTPUT
+ decomposable: MANY
+ intermediate: timestamp_tz?
+ return: timestamp_tz?
  - name: "max"
  description: Max a set of values.
  impls:
@@ -1141,6 +1155,20 @@ aggregate_functions:
  decomposable: MANY
  intermediate: fp64?
  return: fp64?
+ - args:
+ - name: x
+ value: timestamp
+ nullability: DECLARED_OUTPUT
+ decomposable: MANY
+ intermediate: timestamp?
+ return: timestamp?
+ - args:
+ - name: x
+ value: timestamp_tz
+ nullability: DECLARED_OUTPUT
+ decomposable: MANY
+ intermediate: timestamp_tz?
+ return: timestamp_tz?
  - name: "product"
  description: Product of a set of values. Returns 1 for empty input.
  impls: