✨ Add in-place update hooks to API

[alexander-demicev]

What this PR does / why we need it:
This PR introduces the runtime hooks infrastructure for in-place updates as defined in the In-place updates proposal

• CanUpdateMachine - Called during update planning to determine if an extension can handle specific machine changes
• UpdateMachine - Called to perform the actual in-place update on a machine

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

/area runtime-sdk

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