[iOS] Replace LicenseList plugin with official one

[touyou]

Idea Description

I implemented LicenseList plugin in #479 , and offered support of SPM in cybozu/LicenseList#4 .
And now, LicenseList officially supported BuildToolPlugin. So we should replace it.

Reference images and links

• LicenseListPlugin

[touyou]

After created this issue, I notice this info.

In this project, these packages are local plugin (Local defined plugin) and the why of using local plugin is performance issue of Xcode. When using remote package plugin, Xcode CPU usage becomes so high (over 100%).

If LicenseListPlugin could have same problem, we can use only official release bundle.

[fummicc1]

Let me try this issue👀
I think this issue is not urgent, so I believe that I take enough time including my investigation into SwiftPM Plugin since Xcode14.😄

[ry-itto]

Sorry for late response 🙏🏼

@fummicc1
Thanks! Assigned 👍🏼