Quiet check_schema_cache_dump_version errors:

* "Ignoring db/schema_cache.yml because it has expired."

Before:

```
bin/test test/application/rake/multi_dbs_test.rb -n "schema_cache is loaded on primary db in multi-db app"
Run options: -n "schema_cache is loaded on primary db in multi-db app" --seed 13139

Ignoring db/schema_cache.yml because it has expired. The current schema version is 20231017102756, but the one in the schema cache file is 20231017102755.
.
```

Added test cases for this error and "Failed to validate schema cache" in `test/application/rake/dbs_test.rb`.

railties/test/application/rake/dbs_test.rb

@@ -496,6 +496,37 @@ def db_schema_cache_dump
         end
       end
 
+      test "db:schema:cache:dump ignores expired version" do
+        Dir.chdir(app_path) do
+          rails "generate", "model", "book", "title:string"
+          rails "db:schema:cache:dump"
+          rails "generate", "model", "cat", "color:string"
+          rails "db:migrate"
+
+          expired_warning = capture(:stderr) do
+            cache_size = rails("runner", "p ActiveRecord::Base.connection.schema_cache.size", stderr: true).strip
+            assert_equal "0", cache_size
+          end
+          assert_match(/Ignoring .*\.yml because it has expired/, expired_warning)
+        end
+      end
+
+      test "db:schema:cache:dump ignores validation errors" do
+        Dir.chdir(app_path) do
+          rails "generate", "model", "book", "title:string"
+          rails "db:migrate"
+          rails "db:schema:cache:dump"
+
+          ActiveRecord::Migrator.stub(:current_version, -> { raise ActiveRecord::ActiveRecordError, "stubbed error" }) do
+            validation_warning = capture(:stderr) do
+              cache_tables = rails("runner", "p ActiveRecord::Base.connection.schema_cache.columns('books')", stderr: true).strip
+              assert_includes cache_tables, "title", "expected cache_tables to include a title entry"
+            end
+            assert_match(/Failed to validate the schema cache because of ActiveRecord::ActiveRecordError: stubbed error/, validation_warning)
+          end
+        end
+      end
+
       def db_fixtures_load(expected_database)
         Dir.chdir(app_path) do
           rails "generate", "model", "book", "title:string"

railties/test/application/rake/multi_dbs_test.rb

@@ -822,8 +822,11 @@ class TwoMigration < ActiveRecord::Migration::Current
         cache_tables_a = rails("runner", "p ActiveRecord::Base.connection.schema_cache.columns('books')").strip
         assert_includes cache_tables_a, "title", "expected cache_tables_a to include a title entry"
 
-        cache_size_b = rails("runner", "p AnimalsBase.connection.schema_cache.size", stderr: true).strip
-        assert_equal "0", cache_size_b
+        expired_warning = capture(:stderr) do
+          cache_size_b = rails("runner", "p AnimalsBase.connection.schema_cache.size", stderr: true).strip
+          assert_equal "0", cache_size_b
+        end
+        assert_match(/Ignoring .*\.yml because it has expired/, expired_warning)
 
         cache_tables_b = rails("runner", "p AnimalsBase.connection.schema_cache.columns('dogs')").strip
         assert_includes cache_tables_b, "name", "expected cache_tables_b to include a name entry"