[cups] Migrate harness to upstream OpenPrinting project

[fish98]

The OpenPrinting project under the Linux Foundation has initiated the OpenPrinting fuzzing repository to officially maintain OSS-Fuzz testing tasks. This PR includes following updates:

1. Migration of the existing CUPS fuzzing harness to the upstream OpenPrinting/fuzzing project.
2. Updated of CUPS mailing contact list and configuration setting.

All harness building related changes has been locally tested and verified.

We deeply appreciate the contributions from @pkillarjun for his initial integration of the CUPS project into OSS-Fuzz and his support during this migration. However, OpenPrinting has decided to move the corpus, fuzzing harnesses, and build scripts into the repository under its organisation and maintainance. In addition, the bug reports will be firstly processed by OpenPrinting's security team and not by the initial contributor, who is not part of the organisation. These two measures will minimise the security risks and still maintaining the ability of open source fellows to participate in the development.

CC @tillkamppeter @iosifache

[github-actions[bot]]

fish98 is a new contributor to projects/cups. The PR must be approved by known contributors before it can be merged. The past contributors are: pkillarjun, 0x34d

[pkillarjun]

However, OpenPrinting has decided to move the corpus, fuzzing harnesses, and build scripts into the repository under its organisation and maintainance. In addition, the bug reports will be firstly processed by OpenPrinting's security team and not by the initial contributor

Initial contributors are for build fixes, updating harness, and adding new targets. I'm totally cool with this update.

[iosifache]

Thanks for understanding, @pkillarjun 🙏🏻! We hope to see PRs from you in the new repository!

[pkillarjun]

We hope to see PRs from you in the new repository.

I will try. I think it would be better for me to revisit when you fellows are done.