Add NOTICE file for Apache-2.0 dependencies (#4569)

Four modules compiled into the sqlc binary are Apache-2.0 licensed and
ship a NOTICE file: wazero, grpc, and yaml.v3 (both module paths).
Section 4(d) of the Apache License requires redistributions to carry
their attribution notices, so aggregate them into a top-level NOTICE.

Refs #4443


Claude-Session: https://claude.ai/code/session_01Tb9pkPZxJefgFP3vcQ4wrD

Co-authored-by: Claude <noreply@anthropic.com>

Author: kyleconroy

NOTICE

@@ -0,0 +1,48 @@
+This distribution of sqlc includes software licensed under the Apache
+License, Version 2.0, from projects that ship a NOTICE file. As required
+by section 4(d) of that license, their attribution notices are reproduced
+below.
+
+================================================================================
+github.com/tetratelabs/wazero
+================================================================================
+
+wazero
+Copyright 2020-2023 wazero authors
+
+================================================================================
+google.golang.org/grpc
+================================================================================
+
+Copyright 2014 gRPC authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+================================================================================
+gopkg.in/yaml.v3
+go.yaml.in/yaml/v3
+================================================================================
+
+Copyright 2011-2016 Canonical Ltd.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.