Generate DBSnpashot resource (#181)

Brings a new resource `DBSnapshot` to the rds-controller

- Adds generator.yaml and necessary hooks
- Adds e2e tests

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: a-hilaly

apis/v1alpha1/ack-generate-metadata.yaml

@@ -1,13 +1,13 @@
 ack_generate_info:
-  build_date: "2024-05-02T20:49:06Z"
+  build_date: "2024-06-11T08:00:15Z"
   build_hash: 14cef51778d471698018b6c38b604181a6948248
-  go_version: go1.22.0
+  go_version: go1.22.3
   version: v0.34.0
-api_directory_checksum: 11c44032679e136f20ebca3e336bdc3bd8f71312
+api_directory_checksum: 3d96ec8d32c85751df2f90793645364459c63fb2
 api_version: v1alpha1
 aws_sdk_go_version: v1.44.232
 generator_config_info:
-  file_checksum: 1c65701c9ae781dcda0fb8c04fed4de60e25a9ef
+  file_checksum: 9d617a40bcd5f222f428fd01f450f7e41dbfbfee
   original_file_name: generator.yaml
 last_modification:
   reason: API generation

apis/v1alpha1/db_snapshot.go

@@ -13,7 +13,7 @@ ignore:
     #- DBProxy
     - DBProxyEndpoint
     - DBSecurityGroup
-    - DBSnapshot
+    # DBSnapshot
     #- DBSubnetGroup
     - EventSubscription
     #- GlobalCluster
@@ -23,6 +23,10 @@ ignore:
     - DBInstance.DBSecurityGroups
     # We handle Spec.Tags separately...
     - "DescribeDBInstancesOutput.DBInstances.DBInstance.TagList"
+    # These fields are also supported for DBSnapshot updates but we can't
+    # support them for the moment. They require some code-generator modifications.
+    - "CreateDBSnapshotOutput.DBSnapshot.EngineVersion"
+    - "CreateDBSnapshotOutput.DBSnapshot.OptionGroupName"
 operations:
   ModifyDBCluster:
     override_values:
@@ -454,3 +458,22 @@ resources:
         template_path: hooks/db_proxy/sdk_update_post_set_output.go.tpl
       sdk_delete_pre_build_request:
         template_path: hooks/db_proxy/sdk_delete_pre_build_request.go.tpl
+  DBSnapshot:
+    fields:
+      DBSnapshotIdentifier:
+        is_primary_key: true
+      DBInstanceIdentifier:
+        references:
+          resource: DBInstance
+          path: Spec.DBInstanceIdentifier
+      # EngineVersion:
+      #   is_read_only: false
+      # OptionGroupName:
+      #   is_read_only: false
+    hooks:
+      sdk_create_post_set_output:
+        template_path: hooks/db_snapshot/sdk_create_post_set_output.go.tpl
+      sdk_read_many_post_set_output:
+        template_path: hooks/db_snapshot/sdk_read_many_post_set_output.go.tpl
+      sdk_update_pre_build_request:
+        template_path: hooks/db_snapshot/sdk_update_pre_build_request.go.tpl