implement eq_dyn, neq_dyn, lt_dyn, lt_eq_dyn, gt_dyn, gt_eq_dyn for timestamp types

[alamb]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
We are tryng to use the new dynamic comparison kernels added in #858 / #843 by @jimexist
in DataFusion: apache/datafusion#1475

It turns out that Datafusion also supports operations on the timestamp / time arrays as well so we can't use the dynamic kernels (yet)

Describe the solution you'd like
Add support for the following types to eq_dyn, neq_dyn, lt_dyn, lt_eq_dyn, gt_dyn, gt_eq_dyn (there is one macro needed):

DataType::Timestamp(TimeUnit::Nanosecond, _) => {
DataType::Timestamp(TimeUnit::Microsecond, _) => {
DataType::Timestamp(TimeUnit::Millisecond, _) => {
DataType::Timestamp(TimeUnit::Second, _) => {
DataType::Date32 => {
DataType::Date64 => {

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

Additional context

[alamb]

I think this could be accomplished by implementing the appropriate types in macro_rules! typed_compares { in https://github.com/apache/arrow-rs/blob/master/arrow/src/compute/kernels/comparison.rs#L1109