Download extension if it does not exist on the filesystem (#11315)

Previously we attempted to download all extensions in CREATE EXTENSION
statements. Extensions like pg_stat_statements and neon are not remote
extensions, but still we were requesting them when
skip_pg_catalog_updates was set to false.

Fixes: https://github.com/neondatabase/neon/issues/11127

Signed-off-by: Tristan Partin <tristan@neon.tech>

compute/patches/pg_hint_plan_v16.patch

@@ -2,23 +2,6 @@ diff --git a/expected/ut-A.out b/expected/ut-A.out
 index da723b8..5328114 100644
 --- a/expected/ut-A.out
 +++ b/expected/ut-A.out
-@@ -9,13 +9,16 @@ SET search_path TO public;
- ----
- -- No.A-1-1-3
- CREATE EXTENSION pg_hint_plan;
-+LOG:  Sending request to compute_ctl: http://localhost:3081/extension_server/pg_hint_plan
- -- No.A-1-2-3
- DROP EXTENSION pg_hint_plan;
- -- No.A-1-1-4
- CREATE SCHEMA other_schema;
- CREATE EXTENSION pg_hint_plan SCHEMA other_schema;
-+LOG:  Sending request to compute_ctl: http://localhost:3081/extension_server/pg_hint_plan
- ERROR:  extension "pg_hint_plan" must be installed in schema "hint_plan"
- CREATE EXTENSION pg_hint_plan;
-+LOG:  Sending request to compute_ctl: http://localhost:3081/extension_server/pg_hint_plan
- DROP SCHEMA other_schema;
- ----
- ---- No. A-5-1 comment pattern
 @@ -3175,6 +3178,7 @@ SELECT s.query, s.calls
    FROM public.pg_stat_statements s
    JOIN pg_catalog.pg_database d
@@ -27,18 +10,6 @@ index da723b8..5328114 100644
   ORDER BY 1;
                  query                 | calls 
  --------------------------------------+-------
-diff --git a/expected/ut-fdw.out b/expected/ut-fdw.out
-index d372459..6282afe 100644
---- a/expected/ut-fdw.out
-+++ b/expected/ut-fdw.out
-@@ -7,6 +7,7 @@ SET pg_hint_plan.debug_print TO on;
- SET client_min_messages TO LOG;
- SET pg_hint_plan.enable_hint TO on;
- CREATE EXTENSION file_fdw;
-+LOG:  Sending request to compute_ctl: http://localhost:3081/extension_server/file_fdw
- CREATE SERVER file_server FOREIGN DATA WRAPPER file_fdw;
- CREATE USER MAPPING FOR PUBLIC SERVER file_server;
- CREATE FOREIGN TABLE ft1 (id int, val int) SERVER file_server OPTIONS (format 'csv', filename :'filename');
 diff --git a/sql/ut-A.sql b/sql/ut-A.sql
 index 7c7d58a..4fd1a07 100644
 --- a/sql/ut-A.sql

compute/patches/pg_hint_plan_v17.patch

@@ -1,24 +1,3 @@
-diff --git a/expected/ut-A.out b/expected/ut-A.out
-index e7d68a1..65a056c 100644
---- a/expected/ut-A.out
-+++ b/expected/ut-A.out
-@@ -9,13 +9,16 @@ SET search_path TO public;
- ----
- -- No.A-1-1-3
- CREATE EXTENSION pg_hint_plan;
-+LOG:  Sending request to compute_ctl: http://localhost:3081/extension_server/pg_hint_plan
- -- No.A-1-2-3
- DROP EXTENSION pg_hint_plan;
- -- No.A-1-1-4
- CREATE SCHEMA other_schema;
- CREATE EXTENSION pg_hint_plan SCHEMA other_schema;
-+LOG:  Sending request to compute_ctl: http://localhost:3081/extension_server/pg_hint_plan
- ERROR:  extension "pg_hint_plan" must be installed in schema "hint_plan"
- CREATE EXTENSION pg_hint_plan;
-+LOG:  Sending request to compute_ctl: http://localhost:3081/extension_server/pg_hint_plan
- DROP SCHEMA other_schema;
- ----
- ---- No. A-5-1 comment pattern
 diff --git a/expected/ut-J.out b/expected/ut-J.out
 index 2fa3c70..314e929 100644
 --- a/expected/ut-J.out
@@ -160,15 +139,3 @@ index a09bd34..0ad227c 100644
  error hint:
  
                      explain_filter                    
-diff --git a/expected/ut-fdw.out b/expected/ut-fdw.out
-index 017fa4b..98d989b 100644
---- a/expected/ut-fdw.out
-+++ b/expected/ut-fdw.out
-@@ -7,6 +7,7 @@ SET pg_hint_plan.debug_print TO on;
- SET client_min_messages TO LOG;
- SET pg_hint_plan.enable_hint TO on;
- CREATE EXTENSION file_fdw;
-+LOG:  Sending request to compute_ctl: http://localhost:3081/extension_server/file_fdw
- CREATE SERVER file_server FOREIGN DATA WRAPPER file_fdw;
- CREATE USER MAPPING FOR PUBLIC SERVER file_server;
- CREATE FOREIGN TABLE ft1 (id int, val int) SERVER file_server OPTIONS (format 'csv', filename :'filename');

vendor/revisions.json

@@ -1,18 +1,18 @@
 {
   "v17": [
     "17.4",
-    "22533c63fc42cdc1dbe138650ba1eca10a70c5d7"
+    "7ec41bf6cd92a4af751272145fdd590270c491da"
   ],
   "v16": [
     "16.8",
-    "473f68210d52ff8508f71c15b0c77c01296f4ace"
+    "26c7d3f6de6f361c8923bb80d7563853b4a04958"
   ],
   "v15": [
     "15.12",
-    "6cea02e23caa950d5f06932491a91b6af8f54360"
+    "4ac24a747cd897119ce9b20547b3b04eba2cacbd"
   ],
   "v14": [
     "14.17",
-    "35bc1b0cba55680e3b37abce4e67a46bb15f3315"
+    "bce3e48d8a72e70e72dfee1b7421fecd0f1b00ac"
   ]
 }