[FR]: v2 add support for `install_only_stripped` PBS

[chpock]

What is the current behavior?

Before the PR #1187 was merged, only the install_only_stripped interpreter could be registered in the toolchain. But with this PR, that option was removed, and now only either install_only PBS or freethreaded can be used.

This comment says that normal/stripped and optimized/debug runtimes will be selectable, but that was never implemented: #1175 (comment)

Describe the feature

Is it possible to add support for choosing a stripped PBS?