docs: update Japanese remote data operations topic

[mkamiishi]

Summary

Updated the Japanese Remote Data Operations topic to better align with the current English source.

Changes

• Updated the Japanese remote data operations content based on the English source.
• Removed remaining English text from the Japanese content.
• Updated outdated or duplicated sections.
• Preserved code snippets, component names, property names, and API names.

Testing

• Ran npx markdownlint docs/xplat/src/content/jp/components/grids/_shared/remote-data-operations.mdx.
• Confirmed the updated Japanese page loads locally.
• Verified that the same local Vite proxy errors also occur on the unchanged English page, indicating they are unrelated to this Japanese documentation update.

Checklist:

• check topic's TOC/menu and paragraph headings
• Include TOC topic labels in the topic content when it has a valuable update, is new, or is considered preview / beta
• link to other topics using ./page.mdx or ../relative/path.mdx (.mdx extension required)
• at the References section at the end of the topic add links to topics, samples, etc
• reference API documentation instead of adding a section with API

• use valid component names - [Data] Grid, IgxSelectComponent, <igx-combo>
• use spell checker tool (VS Code, Grammarly, Microsoft Editor)
• add inline code blocks for the names of classes / tags / properties
• add language descriptor for the code blocks
• check if links function by running the check-api/mdx npm commands
• check if sample is working and fully visible in the topic
• check if sample is working and fully visible in the StackBlitz
• check if code blocks match the code in StackBlitz demo
• add or update meaningful llms.description metadata and run npm run check:llms-metadata

• follow SEO guidelines to fill topic's metadata (SEO guidelines)

• do not resolve requested changes (leave that to the reviewer)