[mlir][Transform] Create a transform interpreter and a preloader pass (#68661)

This revision provides the ability to use an arbitrary named sequence op
as
the entry point to a transform dialect strategy.

It is also a step towards better transform dialect usage in pass
pipelines
that need to preload a transform library rather thanparse it on the fly.

The interpreter itself is significantly simpler than its testing
counterpart
by avoiding payload/debug root tags and multiple shared modules.

In the process, the NamedSequenceOp::apply function is adapted to allow
it
being an entry point.

NamedSequenceOp is **not** extended to take the PossibleTopLevelTrait at
this
time, because the implementation of the trait is specific to allowing
one
top-level dangling op with a region such as SequenceOp or
AlternativesOp.
In particular, the verifier of PossibleTopLevelTrait does not allow for
an
empty body, which is necessary to declare a NamedSequenceOp that gets
linked
in separately before application.

In the future, we should dispense with the PossibleTopLevelTrait
altogether
and always enter the interpreter with a NamedSequenceOp.

Lastly, relevant TD linking utilities are moved to
TransformInterpreterUtils
and reused from there.