Introduce a pass to increase the amount of dynamism supported by an XLA cluster

Increases the amount of dynamism representable by XLA clusters by rewriting the
TensorFlow graph.  See the header for a description.

This pass, combined with jit/partially_decluster_pass, reduces the number of
unnecessary cluster recompilations in some common cases.

The CL is organized as follows:

 - cc/framework/scope* and core/graph/node_builder are modified so that new
   nodes can now be automatically put in an XLA cluster using
   Scope::WithXlaCluster.

 - The pass is implemented in jit/increase_dynamism_for_auto_jit_pass.

 - In jit/jit_compilation_pass_registration The new pass is registered to run
   between MarkForCompilationPass and PartiallyDeclusterPass.

PiperOrigin-RevId: 218907734