Extract WalProposer into the neon extension (#2217)

Including, but not limited to:

* Fixes to neon management code to support walproposer-as-an-extension

* Fix issue in expected output of pg settings serialization.

* Show the logs of a failed --sync-safekeepers process in CI

* Add compat layer for renamed GUCs in postgres.conf

* Update vendor/postgres to the latest origin/main

compute_tools/src/compute.rs

@@ -178,6 +178,7 @@ impl ComputeNode {
             .args(&["--sync-safekeepers"])
             .env("PGDATA", &self.pgdata) // we cannot use -D in this mode
             .stdout(Stdio::piped())
+            .stderr(Stdio::piped())
             .spawn()
             .expect("postgres --sync-safekeepers failed to start");
 
@@ -187,10 +188,13 @@ impl ComputeNode {
         let sync_output = sync_handle
             .wait_with_output()
             .expect("postgres --sync-safekeepers failed");
+
         if !sync_output.status.success() {
             anyhow::bail!(
-                "postgres --sync-safekeepers exited with non-zero status: {}",
+                "postgres --sync-safekeepers exited with non-zero status: {}. stdout: {}, stderr: {}",
                 sync_output.status,
+                String::from_utf8(sync_output.stdout).expect("postgres --sync-safekeepers exited, and stdout is not utf-8"),
+                String::from_utf8(sync_output.stderr).expect("postgres --sync-safekeepers exited, and stderr is not utf-8"),
             );
         }
 

compute_tools/src/pg_helpers.rs

@@ -62,9 +62,16 @@ impl GenericOption {
     /// Represent `GenericOption` as configuration option.
     pub fn to_pg_setting(&self) -> String {
         if let Some(val) = &self.value {
+            let name = match self.name.as_str() {
+                "safekeepers" => "neon.safekeepers",
+                "wal_acceptor_reconnect" => "neon.safekeeper_reconnect_timeout",
+                "wal_acceptor_connect_timeout" => "neon.safekeeper_connect_timeout",
+                it => it,
+            };
+
             match self.vartype.as_ref() {
-                "string" => format!("{} = '{}'", self.name, val),
-                _ => format!("{} = {}", self.name, val),
+                "string" => format!("{} = '{}'", name, val),
+                _ => format!("{} = {}", name, val),
             }
         } else {
             self.name.to_owned()