Using the "logSourceLocation" function from protocol-test.js prints
slightly better location information for wasm, and especially much
better information for JS breakpoints. This helps understanding and
debugging these tests.

R=thibaudm@chromium.org

Bug: v8:10351
Change-Id: I51c7d168d2cb19fb8469b4a2eb372c2b95650fcb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2120539Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66863}