[tc][all][ec2-api] Retiring the ec2-api project

Hello everyone, As you might know, the ec2-api project is not active and was marked 'inactive' since 2024.1 cycle[1]. In this cycle also, this project is leaderless[2] and no maintainer stepped up to maintain it. As discussed in the Leaderless project etherpad[2], the next step is to retire the project. I'm sending this email to propose the ec2-api retirement and based on the response, I will proceed next. [1] https://governance.openstack.org/tc/reference/emerging-technology-and-inacti... [2] https://etherpad.opendev.org/p/2024.2-leaderless#L72 -gmann