Update version in deprecation message for CircuitInstruction iteration. (#14059)

* Update version in message.

* Add release note.

Author: kevinhartman

crates/circuit/src/circuit_instruction.rs

@@ -698,7 +698,7 @@ fn warn_on_legacy_circuit_instruction_iteration(py: Python) -> PyResult<()> {
                 py,
                 concat!(
                     "Treating CircuitInstruction as an iterable is deprecated legacy behavior",
-                    " since Qiskit 1.2, and will be removed in Qiskit 2.0.",
+                    " since Qiskit 1.2, and will be removed in Qiskit 3.0.",
                     " Instead, use the `operation`, `qubits` and `clbits` named attributes."
                 )
             ),

releasenotes/notes/extend-deprecation-tuple-inst-f24ab7a5632191e3.yaml

@@ -0,0 +1,9 @@
+---
+deprecations_circuits:
+  - |
+    The deprecated tuple-like interface for :class:`~.circuit.CircuitInstruction` was not
+    removed in this release as originally planned. It will be removed in Qiskit 3.0.0
+    instead. Instead, use the
+    :class:`~.circuit.CircuitInstruction.operation`,
+    :class:`~.circuit.CircuitInstruction.qubits`, and
+    :class:`~.circuit.CircuitInstruction.clbits` named attributes.