A bunch of test expectations change because 7f531d8426 means that we now see (a) local variable declarations with source locations covering only their identifier, not the whole statement, and (b) more SYNTHETIC_OFFSET values for the parts of a destructuring assignment
or initialiser, which show up as file.kt:0:0:0:0 in DbLocation form.
Java's regular strings are formatted as they appear in source, but we don't easily have this information available in Kotlin. During annotation extraction however it guesses a source rendering because the source is not necessarily available. By formatting to match the annotation extractor, we prepare to ensure consistency with a Java database
when extracting annotations as seen by Kotlin.
These are extracted as "throw new kotlin.NoWhenBranchFoundException();", which is the Java lowering of the intrinsic.
In the process, amend the control-flow graph to let when branches propagate `throw`s outwards, and similarly statement expressions.
