docs: migrate kratos debug docs to deployment structure

[hperl]

Fixes the sidebar hijack on the kratos debug/troubleshooting pages: they were autogenerated into both the OEL and OSS sidebars (dirName: "kratos/debug"), and since Docusaurus associates each doc with exactly one sidebar, opening e.g. /docs/kratos/debug/csrf from the OEL tree reshuffled the navigation into OSS. Same bug class as #2674, applied to the self-hosted deployments.

• Page bodies move to shared partials under src/components/Shared/kratos/debug/ (the two CommonMark .md pages keep their extension — format: "detect" — so they stay JSX-free).
• Thin shells under docs/oel/kratos/debug/ and docs/oss/kratos/debug/; each deployment's sidebar autogenerates from its own directory, so OEL and OSS readers keep their own navigation.
• Canonical rule: these pages are self-hosted-only, so the self-hosted exception applies — OEL shells are self-canonical and the OSS shells' canonicals point at the OEL URLs. No Network shells (Network never listed these pages).
• Old URLs (/docs/kratos/debug/*) 308-redirect to the OEL pages.
• Inbound links updated: docs/troubleshooting/10_crsf.mdx uses SameDeploymentLink with a network= override (no Network shell exists), and the CommonMark guide setting-up-password-hashing-parameters.md points at the canonical OEL URL.

Related Issue or Design Document

Part of #2674.

Checklist

• I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• I confirm that this pull request does not address a security vulnerability.
• I have added tests that prove my fix is effective or that my feature works.
• I have added the necessary documentation within the code base (if appropriate).

Further comments

Stacked on #2675 (base is its branch, so this diff shows only the debug migration; GitHub retargets to master when #2675 merges). Full docusaurus build passes; the only remaining warnings are the pre-existing /docs/reference/openapi/* and /docs/reference/api#operation/* ones that exist on master too.

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