pagserver: use vectored read path in benchmarks (#7498)

## Problem
Benchmarks don't use the vectored read path.

## Summary of changes
* Update the benchmarks to use the vectored read path for both singular
and vectored gets.
* Disable validation for the benchmarks

control_plane/src/local_env.rs

@@ -130,6 +130,7 @@ pub struct PageServerConf {
     pub(crate) virtual_file_io_engine: Option<String>,
     pub(crate) get_vectored_impl: Option<String>,
     pub(crate) get_impl: Option<String>,
+    pub(crate) validate_vectored_get: Option<bool>,
 }
 
 impl Default for PageServerConf {
@@ -143,6 +144,7 @@ impl Default for PageServerConf {
             virtual_file_io_engine: None,
             get_vectored_impl: None,
             get_impl: None,
+            validate_vectored_get: None,
         }
     }
 }

control_plane/src/pageserver.rs

@@ -93,6 +93,7 @@ impl PageServerNode {
             virtual_file_io_engine,
             get_vectored_impl,
             get_impl,
+            validate_vectored_get,
         } = &self.conf;
 
         let id = format!("id={}", id);
@@ -117,6 +118,11 @@ impl PageServerNode {
         } else {
             String::new()
         };
+        let validate_vectored_get = if let Some(validate_vectored_get) = validate_vectored_get {
+            format!("validate_vectored_get={validate_vectored_get}")
+        } else {
+            String::new()
+        };
 
         let broker_endpoint_param = format!("broker_endpoint='{}'", self.env.broker.client_url());
 
@@ -131,6 +137,7 @@ impl PageServerNode {
             virtual_file_io_engine,
             get_vectored_impl,
             get_impl,
+            validate_vectored_get,
         ];
 
         if let Some(control_plane_api) = &self.env.control_plane_api {