feat: enhance Java version retrieval with fallback strategies and add dry run support

[billytrend-cohere]

Description

This PR updates the create-releases.ts and create-sdk-releases.yml files. The changes introduce a dry run feature, which allows the user to preview the release process without actually creating a release. This is achieved by adding a dry_run option to the version input, and by modifying the runFernGenerate function to include a --preview flag when the dry_run or FERN_PREVIEW environment variable is set to 'true'.

Changes

• The create-sdk-releases.yml file has been updated to include a dry_run option in the version input, allowing users to preview the release process without creating a release.
• The runFernGenerate function in the create-releases.ts file has been modified to include a --preview flag when the dry_run or FERN_PREVIEW environment variable is set to 'true'.
• The createRelease function in the create-releases.ts file has been updated to skip the creation of a GitHub release when the dry_run or FERN_PREVIEW environment variable is set to 'true'.
• The getJavaVersion function in the create-releases.ts file has been refactored to use multiple fallback query patterns and handle errors more gracefully.

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