Set specifications only for cloud

[vermakhushboo]

What does this PR do?

Only pass specifications if on cloud

Test Plan

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Related PRs and Issues

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Summary by CodeRabbit

• Bug Fixes
  • Improved compatibility for self-hosted/non-cloud environments by omitting unsupported “specification” data during Function and Site creation/updates. Applies to create flows (deploy, manual, repo, template) and settings updates (build, runtime, events, logging, name, permissions, scopes, schedule, resource limits, timeout, repository). Reduces errors and unexpected behavior outside cloud deployments.
• Chores
  • Standardized payload handling across Function and Site settings to respect cloud vs. non-cloud contexts.