fix(connect): restore rustfs build after site replication perf producer (#7779)

#7769 left rustfs/src/connect/diagnostics/perf_site_replication.rs failing
to compile: a local binding named object_url shadowed the object_url()
helper in the same scope (E0618), and a test put the consent nonce on the
request instead of LocalSiteReplicationConsent (E0063/E0560).

Rename the binding to source_url and move the test nonce into the consent.

rustfs/src/connect/diagnostics/perf_site_replication.rs

@@ -1478,6 +1478,7 @@ mod tests {
                 consent_uid: "019e3ae0-0000-7000-8000-000000000015".to_owned(),
                 policy_revision: 7,
                 expires_at_unix: now + 120,
+                nonce: [0x6b; 32],
                 confirmed: true,
                 nonce: [0x6b; 32],
             },