feat(alibaba-cn): add GLM-5.2

[callmepopo]

Summary

Adds the Alibaba Cloud Model Studio supplied glm-5.2 model to the alibaba-cn provider.

This is the Alibaba-supplied model listed in Model Studio as glm-5.2, not the third-party direct ZHIPU/GLM-5.2 listing.

Details

• Reuses canonical GLM-5.2 metadata through base_model = "zhipuai/glm-5.2"
• Uses reasoning_options = [] because Alibaba-specific GLM-5.2 reasoning controls have not been provider-audited yet
• Keeps interleaved.field = "reasoning_content"
• Sets pricing from the Alibaba Cloud Model Studio detail page

First-party reference:
https://bailian.console.aliyun.com/cn-beijing/?tab=model#/model-market/detail/glm-5.2?serviceSite=asia-pacific-china

Related blocked PR: #2676
Related OpenCode request: anomalyco/opencode#34889

Validation

• Parsed the added TOML with Python tomllib
• git diff --check
• Did not run bun validate locally because Bun is not installed in this environment; GitHub Actions should run the repository validation

[callmepopo]

Hi maintainers, this PR is now ready for review.

A few notes to make the intent clear:

• This adds the Alibaba Cloud Model Studio supplied glm-5.2 under the alibaba-cn provider.
• It intentionally uses reasoning_options = [], following the feedback on feat(alibaba-cn): add GLM-5.2 model #2676 that high/max are not audited Alibaba GLM-5.2 reasoning controls.
• The pricing reference is the official Alibaba Cloud Model Studio GLM-5.2 detail page already linked in the PR body.
• The GitHub Actions validate check is passing.

Thanks for taking a look.