Sync core to HEAD of typespec/microsoft#11014: fix null LRO bodies, fix duplicate samples, update deps

[Copilot]

Bumps the core submodule to 08d60b0 (which builds on #11007) and applies the corresponding generated-file updates, Node.js dependency updates, and a patch release bump.

Core changes (in typespec)

• FluentServiceClientTemplate.java: responseBody == null ? null → new byte[0] to avoid NPE when service returns no body on LRO error
• FluentExampleTemplate.java: skip duplicate methods in generated samples when advanced-versioning=true
• Adds FluentServiceClientTemplateTests unit test
• Updates @azure-tools/typespec-autorest, @azure-tools/typespec-azure-resource-manager, @azure-tools/typespec-azure-rulesets to 0.69.1

This repo

• Core submodule → 08d60b0
• Regenerated 14 management *ClientImpl.java files in typespec-tests to reflect the null LRO body fix:

// before
this.responseBody = responseBody == null ? null : responseBody.getBytes(StandardCharsets.UTF_8);

// after
this.responseBody = responseBody == null ? new byte[0] : responseBody.getBytes(StandardCharsets.UTF_8);

• Node.js dependencies updated in typespec-extension and typespec-tests:
  • @azure-tools/typespec-autorest, @azure-tools/typespec-azure-resource-manager, @azure-tools/typespec-azure-rulesets: 0.69.0 → 0.69.1
  • @microsoft/api-extractor: ^7.58.8 → ^7.58.9
  • vitest / @vitest/coverage-v8 / @vitest/ui: ^4.1.8 → ^4.1.9
• npm install + npm audit fix run in typespec-extension
• Version bumped to 0.45.4 with changelog entry

[weidongxu-microsoft]

@copilot update the core to HEAD of microsoft/typespec#11014

also update node.js dependencies (for typespec-extension also run a npm audit --fix after npm install)
and prepare for patch release

[Copilot]

@copilot update the core to HEAD of microsoft/typespec#11014

also update node.js dependencies (for typespec-extension also run a npm audit --fix after npm install)
...

Done. Updated in commits:

• Core submodule → 08d60b0 (HEAD of typespec/microsoft#11014, which builds on #11007)
• Node.js deps updated: @azure-tools/typespec-autorest, @azure-tools/typespec-azure-resource-manager, @azure-tools/typespec-azure-rulesets → 0.69.1; @microsoft/api-extractor → ^7.58.9; vitest/@vitest/* → ^4.1.9
• npm install + npm audit fix run in typespec-extension (3 pre-existing moderate vulns in js-yaml via @autorest/codemodel cannot be fixed without breaking changes)
• Version bumped to 0.45.4 with changelog entry dated 2026-06-18