Ensure viskores license is detected correctly with extra rules

Reported by @opoplawski and discussed with @richardfontana on the Fedora legal mailing list:
https://lists.fedoraproject.org/archives/list/legal@lists.fedoraproject.org/thread/NEF754GWMNKY2YJ4CSWQG4472IHPPGX7/

This is a plain BSD-3-Cluase license that has been given another name by @vicentebolea

See for notices that may need some love to be detected correctly
- https://github.com/Viskores/viskores/blob/537a4a91a38fc6e1fa783369f458fcf6bbc1e8a9/CMake/ViskoresDeviceAdapters.cmake#L1

```
## The contents of this file are covered by the Viskores license. See
## LICENSE.txt for details.
##
## By contributing to this file, all contributors agree to the Developer
## Certificate of Origin Version 1.1 (DCO 1.1) as stated in DCO.txt.
```

The license text itself at https://raw.githubusercontent.com/Viskores/viskores/refs/heads/main/LICENSE.txt is detected correctly as a BSD-3-Clause by ScanCode, with one word (AUTHORS) not matched, so we could add one rule for that:

> matched_text_diagnostics: |
> Redistribution and use in source and binary forms, with or without
> modification, are permitted provided that the following conditions are
> met:
>
> * Redistributions of source code must retain the above copyright
> notice, this list of conditions and the following disclaimer.
>
> * 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.
>
> * Neither the name of **[Kitware]** nor the names of any contributors may
> be used to endorse or promote products derived from this software
> without specific prior written permission.
>
> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 **[AUTHORS]** OR
> CONTRIBUTORS 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.

@alok1304 ... this could be a nice test case for your project.