Fix clippy failures with Rust 1.67.0 (#9470)

Rust 1.67.0 released earlier today and with it the default set of rules
in clippy changed. A new rule checking the use of the `format!()` macro
was added that triggers on some of the returned exception strings we
were using. This commit fixes this issue so that we're able to pass
clippy with the latest version of Rust.

src/pauli_exp_val.rs

@@ -58,8 +58,7 @@ pub fn expval_pauli_no_x(
 ) -> PyResult<f64> {
     if num_qubits >= usize::BITS as usize {
         return Err(PyOverflowError::new_err(format!(
-            "The value for num_qubits, {}, is too large and would overflow",
-            num_qubits
+            "The value for num_qubits, {num_qubits}, is too large and would overflow"
         )));
     }
     let data_arr = data.as_slice()?;
@@ -93,8 +92,7 @@ pub fn expval_pauli_with_x(
 ) -> PyResult<f64> {
     if num_qubits > usize::BITS as usize {
         return Err(PyOverflowError::new_err(format!(
-            "The value for num_qubits, {}, is too large and would overflow",
-            num_qubits
+            "The value for num_qubits, {num_qubits}, is too large and would overflow",
         )));
     }
     let data_arr = data.as_slice()?;
@@ -149,8 +147,7 @@ pub fn density_expval_pauli_no_x(
 ) -> PyResult<f64> {
     if num_qubits >= usize::BITS as usize {
         return Err(PyOverflowError::new_err(format!(
-            "The value for num_qubits, {}, is too large and would overflow",
-            num_qubits
+            "The value for num_qubits, {num_qubits}, is too large and would overflow",
         )));
     }
     let data_arr = data.as_slice()?;
@@ -185,8 +182,7 @@ pub fn density_expval_pauli_with_x(
 ) -> PyResult<f64> {
     if num_qubits >= usize::BITS as usize {
         return Err(PyOverflowError::new_err(format!(
-            "The value for num_qubits, {}, is too large and would overflow",
-            num_qubits
+            "The value for num_qubits, {num_qubits}, is too large and would overflow",
         )));
     }
     let data_arr = data.as_slice()?;

src/sabre_swap/swap_map.rs

@@ -36,8 +36,7 @@ impl SwapMap {
         match self.map.get(&object) {
             Some(val) => Ok(val.clone()),
             None => Err(PyIndexError::new_err(format!(
-                "Node index {} not in swap mapping",
-                object
+                "Node index {object} not in swap mapping",
             ))),
         }
     }