[bazel.build] Problem with /tutorials/ccp-toolchain-config

### Page link:

https://bazel.build/tutorials/ccp-toolchain-config

### Problem description (include actual vs expected text, if applicable):

The article discusses how to use `cc_toolchain_suite`, but IIUC `register_toolchains` is the new way to to specify it (https://stackoverflow.com/questions/58291691/what-is-the-difference-between-cc-toolchain-suite-and-register-toolchains).

While perhaps reasonable to still have a tutorial of the old way, seems worth having a tutorial in the new method to encourage adoption.

### Where do you see this issue? (include link to specific section of the page, if applicable)

_No response_

### Any other information you'd like to share?

_No response_

Start with the linked https://bazel.build/tutorials/ccp-toolchain-config page and compare its cc_toolchain_suite instructions with the register_toolchains approach described in the issue. Done means the documentation explains the newer method clearly, while preserving or intentionally replacing the existing tutorial guidance.

Written by the indexing model from the issue text.