[FLINK-34184] Update copyright and license file

[ruanhang1993]

This PR updates copyright for each file and license file.

[Jiabao-Sun]

Thanks @ruanhang1993 for this update.

Shall we change the NOTICE and site/NOTICE file as well?

flink-cdc/NOTICE

Lines 1 to 3 in f7fa317

	flink-cdc-connectors
	Copyright 2023 Ververica Inc.
	Apache Flink, Flink®, Apache®, the squirrel logo, and the Apache feather logo are either registered trademarks or trademarks of The Apache Software Foundation.

Some files in the docs directory, such as Dockerfile, make.bat, site/index.html, appear to be missing a license header.

[ruanhang1993]

Thanks @ruanhang1993 for this update.

Shall we change the NOTICE and site/NOTICE file as well?

flink-cdc/NOTICE

Lines 1 to 3 in f7fa317

	flink-cdc-connectors
	Copyright 2023 Ververica Inc.
	Apache Flink, Flink®, Apache®, the squirrel logo, and the Apache feather logo are either registered trademarks or trademarks of The Apache Software Foundation.

Some files in the docs directory, such as Dockerfile, make.bat, site/index.html, appear to be missing a license header.

We have a different issue(https://issues.apache.org/jira/browse/FLINK-34183) to change the LICENSE files. I will raise another PR to change it. @Jiabao-Sun

[ruanhang1993]

@Jiabao-Sun @leonardBang , the header of some files are not changed.

1. termynal.css and termynal.js have the following header.

/**
 * termynal.js
 *
 * @author Ines Montani <ines@ines.io>
 * @version 0.0.1
 * @license MIT
 */

2. The classes we copied from the debezium have the following header:

/*
 * Copyright Debezium Authors.
 *
 * Licensed under the Apache Software License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
 */

I am not sure how to change their headers. WDYT?

[leonardBang]

@Jiabao-Sun @leonardBang , the header of some files are not changed.

1. termynal.css and termynal.js have the following header.

/**
 * termynal.js
 *
 * @author Ines Montani <ines@ines.io>
 * @version 0.0.1
 * @license MIT
 */

2. The classes we copied from the debezium have the following header:

/*
 * Copyright Debezium Authors.
 *
 * Licensed under the Apache Software License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
 */

I am not sure how to change their headers. WDYT?

I think we should keep current header.

[leonardBang]

Thanks @ruanhang1993 for the huge PR, LGTM