fix ibm-fsm Repo-Jacking

[kurtis318]

What does this PR do?

Recently, the namespace ibm-fms was renamed to ibm-ai-platform. After the rename, we were able to take over the old namespace, a supply-chain vulnerability known as Repo-Jacking (or Model-Jacking in the context of LLMs). The core risk here is that many official references still point to the old namespace, whether in production pipelines, existing code, documentation, or other materials. Some of these references even load models with trust_remote_code=True (or similar), which could allow remote code execution if the namespace is hijacked.

This PR applies changes to:
docs/source/en/model_doc/bamba.md
src/transformers/models/bamba/configuration_bamba.py
tests/models/bamba/test_modeling_bamba.py

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