[BugFix][Model]: Pass indexer_rotary_emb to MLA modules

[aaarkai]

Purpose

to fix issues: #31889

• pass indexer_rotary_emb into MLAModules for KimiMLAAttention to match the updated constructor
• do the same for OpenPangu MLA to prevent the same init-time crash
• keep MLA init aligned across models that don’t use sparse indexing

Test Plan

vllm serve moonshotai/Kimi-Linear-48B-A3B-Instruct --trust-remote-code --host 0.0.0.0 --port 8999  --tensor-parallel-size 4 --max-model-len 1048576 --no-enable-prefix-caching

Test Result

server launch success

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• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
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• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

[gemini-code-assist]

Code Review

This pull request addresses an initialization crash in KimiMLAAttention and OpenPanguMLAAttention by passing the newly required indexer_rotary_emb argument to the MLAModules constructor. The changes are correct and necessary to align with the updated MLAModules interface. The fix is straightforward, well-contained, and I have no further comments.

[jeejeelee]

See: #31889 (comment)

[aaarkai]

The fix has already been applied in e3fbb6f
, so this pr can be closed.