Add min instance count/percentage configurations for stateless service update and create

[Christina-Kang]

Fixes # .

Changes include:

Verified:

• [ ] Build and test CI passes
• [ ] History and readme updated to reflect changes
• [ ] Package version updated according to semantic versioning rules
• [ ] Tests modified or added, when applicable
• [ ] Updated code owners file, when applicable
• [ ] Read the PR checklist