[conn,tcl] The "reset" line in the connectivity check is backwards

### Description

In `conn.tcl`, the line
```tcl
reset -expr {POR_N}
```
tells Jasper that the chip should be considered in reset (and thus the connectivity properties don't need to hold) if `POR_N` is true.

This will need sorting out properly when we start getting the connectivity checks working again.

Start with conn.tcl and inspect how Jasper interprets the reset -expr {POR_N} line in the connectivity checks. Confirm the intended reset polarity and determine the proper correction once the connectivity checks are working again; done means the reset condition no longer disables checks when POR_N is true.

Written by the indexing model from the issue text.