RSZ: extract parasitics for repair timing and repair design inside rsz code

[eder-matheus]

Description

Follow-up on PR #6052.

The current implementation assumes that the parasitics will be extracted before running the repair command, so the estimation part of the flow is doing nothing when the design is routed.

Suggested Solution

Call parasitcs extraction inside the estimation code, when the parasitics source is detailed routing. This includes extracting the parasitics and feeding them to sta.

Additional Context

No response