fix: swaps deprecated container-structure-test plugin with a function…

[FeryET]

Summary

This pull requests removes the old container-structure-test plugin and adds a new plugin that can install the package reliably in various environments.

• Tool repo URL: https://github.com/GoogleContainerTools/container-structure-test
• Plugin repo URL: https://github.com/FeryET/asdf-container-structure-test

Checklist

• Format with scripts/format.bash
• Test locally with scripts/test_plugin.bash --file plugins/<your_new_plugin_name>
• Your plugin CI tests are green
• Manual plugin tests using asdf plugin test command also succeeded in docker test environments.
  • Tip: use the plugin_test action from asdf-actions in your plugin CI

[jthegedus]

Thanks