refactor(sql): Consolidate changes to oplog_entry into one migration

internal/db/schema/migrations/oss/postgres/56/01_oplog_key_id_scope_id_truncation.up.sql

@@ -5,7 +5,7 @@ begin;
 
   truncate table oplog_entry, oplog_metadata;
 
-  -- replaced by 76/01_kms_oplog.up.sql and 76/03_kms_oplog.up.sql
+  -- replaced by 77/04_alter_oplog_entry.up.sql
   alter table oplog_entry
     add column key_id kms_private_id not null
       constraint kms_data_key_version_fkey
@@ -18,7 +18,7 @@ begin;
         on delete cascade
         on update cascade;
         
-  -- replaced by 76/01_kms_oplog.up.sql
+  -- replaced by 77/04_alter_oplog_entry.up.sql
   create function insert_oplog_entry() returns trigger
   as $$
   begin

internal/db/schema/migrations/oss/postgres/77/03_kms_oplog.up.sql

@@ -129,14 +129,7 @@ from kms_data_key_version kdkv, kms_oplog_data_key kodk
 where kdkv.data_key_id = kodk.private_id;
 
 -- ############################################################################
--- post conversion, we add the required constraints and triggers
-
-alter table oplog_entry
-  add constraint kms_oplog_data_key_version_fkey
-    foreign key(key_id)
-      references kms_oplog_data_key_version (private_id)
-      on delete restrict
-      on update cascade;
+-- post conversion, we add the required triggers
 
 create trigger kms_default_create_time_column before insert on kms_oplog_root_key
   for each row execute procedure kms_default_create_time();

internal/db/schema/migrations/oss/postgres/77/04_alter_oplog_entry.up.sql

@@ -5,7 +5,12 @@ begin;
 
 alter table oplog_entry
   drop constraint iam_scope_fkey,
-  drop constraint kms_data_key_version_fkey;
+  drop constraint kms_data_key_version_fkey,
+  add constraint kms_oplog_data_key_version_fkey
+    foreign key(key_id)
+      references kms_oplog_data_key_version (private_id)
+      on delete restrict
+      on update cascade;
 
 drop trigger insert_oplog_entry on oplog_entry;
 drop function insert_oplog_entry();
@@ -27,4 +32,4 @@ comment on function insert_oplog_entry() is
 create trigger insert_oplog_entry before insert on oplog_entry
   for each row execute procedure insert_oplog_entry();
 
-commit;
+commit;