[dice] Optimize iteration handling in dice::execute_steps

To avoid unnecessary vector collect in the process.

Bug: 267575445
Test: atest diced_utils_test diced_sample_inputs_test \
diced_test diced_vendor_test

Change-Id: I5b78dad7394e6ca88e238ef5806dd574da083657
diff --git a/diced/src/diced_client_test.rs b/diced/src/diced_client_test.rs
index 3915508..f579a4e 100644
--- a/diced/src/diced_client_test.rs
+++ b/diced/src/diced_client_test.rs
@@ -52,11 +52,7 @@
         diced_utils::ResidentArtifacts::new(&former.cdiAttest, &former.cdiSeal, &former.bcc.data)
             .unwrap();
 
-    let input_values: Vec<diced_utils::InputValues> =
-        input_values.iter().map(|v| v.into()).collect();
-
-    let artifacts =
-        artifacts.execute_steps(input_values.iter().map(|v| v as &dyn dice::InputValues)).unwrap();
+    let artifacts = artifacts.execute_steps(input_values.iter()).unwrap();
     let (cdi_attest, cdi_seal, bcc) = artifacts.into_tuple();
     let from_former = diced_utils::make_bcc_handover(
         cdi_attest[..].try_into().unwrap(),
@@ -96,11 +92,7 @@
     )
     .unwrap();
 
-    let input_values: Vec<diced_utils::InputValues> =
-        input_values.iter().map(|v| v.into()).collect();
-
-    let artifacts =
-        artifacts.execute_steps(input_values.iter().map(|v| v as &dyn dice::InputValues)).unwrap();
+    let artifacts = artifacts.execute_steps(input_values.iter()).unwrap();
     let (cdi_attest, cdi_seal, bcc) = artifacts.into_tuple();
     let from_former = diced_utils::make_bcc_handover(
         cdi_attest[..].try_into().unwrap(),
@@ -160,11 +152,8 @@
     .unwrap();
 
     let client = [client];
-    let input_values: Vec<diced_utils::InputValues> =
-        input_values.iter().chain(client.iter()).map(|v| v.into()).collect();
 
-    let artifacts =
-        artifacts.execute_steps(input_values.iter().map(|v| v as &dyn dice::InputValues)).unwrap();
+    let artifacts = artifacts.execute_steps(input_values.iter().chain(client.iter())).unwrap();
     let (cdi_attest, cdi_seal, bcc) = artifacts.into_tuple();
     let from_former = diced_utils::make_bcc_handover(
         cdi_attest[..].try_into().unwrap(),