Update license to new format

[kflemin]

We received permission not to copy the full license in the header of each file. Instead, we can just have the following:

OpenStudio(R), Copyright (c) Alliance for Sustainable Energy, LLC.
See also https://openstudio.net/license

Additionally, the wording of the license is SLIGHTLY different. This should replace LICENSE.md and the top of copyright.txt.

New wording:

OpenStudio(R), Copyright (c) 2008, 2023 Alliance for Sustainable Energy, LLC.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Redistribution of this software, without modification, must refer to the software by the same designation. Redistribution of a modified version of this software (i) may not refer to the modified version by the same designation, or by any confusingly similar designation, and (ii) must refer to the underlying software originally provided by Alliance as “OpenStudio®”. Except to comply with the foregoing, the term “OpenStudio®”, or any confusingly similar designation may not be used to refer to any modified version of this software or any modified version of the underlying software originally provided by Alliance without the prior written consent of Alliance.

4. The name of the copyright holder(s), any contributors, the United States Government, the United States Department of Energy, or any of their employees may not be used to endorse or promote products derived from this software without specific prior written permission from the respective party.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND ANY CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S), ANY CONTRIBUTORS, THE UNITED STATES GOVERNMENT, OR THE UNITED STATES DEPARTMENT OF ENERGY, NOR ANY OF THEIR EMPLOYEES, BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

[jmarrec]

copyright.txt has a lot of old stuff in there. I don't know if we need to keep listing Qt for eg since we remove it as a dependency at 3.0.0.
Most of these license have probably changed in the past 12 years.

Anyways, see #4910