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Add fast-path construction to `DAGCircuit` methods (#10753)

* Add fast-path construction to `DAGCircuit` methods

This optimises the constructor functions
`DAGCircuit.apply_operation_back`, `apply_operation_front` and `compose`
by giving callers a way to skip the validity checking when passing
known-good values.  In most cases when we're operating on the DAG, we
are certain that we're already upholding the invariants of the data
structure by nature of having a `copy_empty_like` or similar, and the
user should not pay a runtime price for what we should catch during
testing.

* Check for possibility of bits before iterating

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Co-authored-by: John Lapeyre <jlapeyre@users.noreply.github.com>

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