Python: bump package versions for 1.8.0 release (#6351)
- Released cohort (core, openai, foundry, root): 1.7.0 -> 1.8.0
- agent-framework-github-copilot: promote to RC (1.0.0rc1)
- agent-framework-orchestrations: rc2 -> rc3 (bug fix)
- Beta/alpha packages with changes: a2a, anthropic, azurefunctions, bedrock,
foundry-hosting, mistral bumped to new date stamp (260604)
- Inter-package dependency bounds updated for changed packages
- CHANGELOG.md and PACKAGE_STATUS.md updated
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>