Bump versions to 0.42.1/6.0.45 and update changelogs

[Copilot]

This PR bumps the versions for the three main libraries and updates their changelogs to include the recent merged PR since the last release.

Changes Made

Version Updates

• @azure-tools/rlc-common: 0.42.0 → 0.42.1
• @azure-tools/typespec-ts: 0.42.0 → 0.42.1
• @autorest/typescript: 6.0.44 → 6.0.45

Dependency Updates

• Updated workspace dependencies in typespec-ts and autorest.typescript to reference the new rlc-common version
• Updated typespec-test dependency on typespec-ts to the new version

Changelog Updates

• [Feature] Generate tsconfig.snippets.json. Please refer to #3373
• [Bugfix] Fix the import ordering in-consistent issues . Please refer to #3383
• [Feature] Upgrade TypeSpec and TCGC versions to latest releases. Please refer to #3381
• [Feature] Add the cloudSetting option for ARM Modular SDK. Please refer to #3233
• [Feature] [release.yml] Fix typo in demands. Please refer to #3370

Files Modified

• packages/rlc-common/package.json - Version bump and changelog
• packages/typespec-ts/package.json - Version bump, dependency update, and changelog
• packages/autorest.typescript/package.json - Version bump, dependency update, and changelog
• packages/typespec-test/package.json - Dependency update
• All three CHANGELOG.md files with new entries

Validation

• ✅ All package.json files are syntactically correct
• ✅ Version numbers correctly updated
• ✅ Workspace dependencies properly updated
• ✅ TypeScript compilation passes for base package (rlc-common)

Fixes #3385.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• googlechromelabs.github.io
  • Triggering command: node install.mjs (dns block)
• https://storage.googleapis.com/chrome-for-testing-public/122.0.6261.111/linux64/chrome-headless-shell-linux64.zip
  • Triggering command: node install.mjs (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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