[dev.typeparams] cmd/internal/dwarf: remove putInlinedFunc's callersym param

This parameter is only used for debugging, and all of putInlinedFunc's
callers were actually passing the callee symbol instead.

Change-Id: I964825a514cc42a1b0bcbce4ef11a1a47084d882
Reviewed-on: https://go-review.googlesource.com/c/go/+/332370


Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>