Update Cassandra logos on ASF project logos site

It appears that the Cassandra logos on the ASF project logos website are outdated, as they include lowercase letters and no trademark: https://www.apache.org/logos/#cassandra

The logo currently being used on the website is this one: https://github.com/apache/cassandra-website/blob/trunk/site-content/source/modules/ROOT/images/logo-white.svg

To ensure proper usage by contributors and third parties, I propose the creation of the following logo set based on the current website logo:

Version 1 - update and create black and white versions
Version 2- remove
Version 3 - update and create black and white versions
Version 4 - no change

If these already exist somewhere, then please upload them to the ASF project logos page (requires a committer): https://www.apache.org/logos/about.html

Otherwise I will be asking our designer to create hi-res versions to be uploaded.