Delete or update deprecated test.pypi and pypi projects

[MIchaelMainer]

Wisely update the package availability and statements to make it clear which Python packages are intended to be used and that are on our support path. Yank releases where it is expected that a customer could have taken a dependency - make sure you add a reason so that pip will display a message about the status of the package. Delete packages that no one could've taken a dependency on. Another avenue to communicate is to update _init.py which provides the summary for the package, as well as update readme files so that we clearly communicate the quality stage for a package.

"This package has been deprecated. Please switch to the msgraph-core package in main PyPI." AB#9824