Get Server Component Function Location for Parent Stacks using Child's Owner Stack (#33629)

This is using the same trick as #30798 but for runtime code too. It's
essential zero cost.

This lets us include a source location for parent stacks of Server
Components when it has an owned child's location. Either from JSX or
I/O.

Ironically, a Component that throws an error will likely itself not get
the stack because it won't have any JSX rendered yet.