[Mics] add pcp basic support to MoE model

[pisceskkk]

Purpose

Add the modifications missed in the PR #28718 for basic PCP feature support.

CC @LucasWilkinson @FENP @LookAround0301

[gemini-code-assist]

Code Review

This pull request addresses a bug by adding basic support for Prefill Context Parallelism (PCP) to the MoE model configuration. It introduces pcp_size and pcp_rank properties to the FusedMoEConfig class, which were missed in a previous pull request. The implementation correctly delegates to the moe_parallel_config and is consistent with existing properties for other parallelism types. The changes are correct and necessary for full PCP feature support in MoE models.

[mergify]

Hi @pisceskkk, the pre-commit checks have failed. Please run:

uv pip install pre-commit
pre-commit install
pre-commit run --all-files

Then, commit the changes and push to your branch.

For future commits, pre-commit will run automatically on changed files before each commit.

Tip

Is mypy or markdownlint failing?

mypy and markdownlint are run differently in CI. If the failure is related to either of these checks, please use the following commands to run them locally:

# For mypy (substitute "3.10" with the failing version if needed)
pre-commit run --hook-stage manual mypy-3.10
# For markdownlint
pre-commit run --hook-stage manual markdownlint

[LucasWilkinson]

LGTM