[EH] Rename delegateTarget to exceptionTarget (NFC) (#3562)

So far `Try`'s label is only targetted by `delegate`s, but it turns out
`rethrow` also has to follow the same rule as `delegate` so it needs to
target a `Try` label. So this renames variables like
`delegateTargetNames` to `exceptionTargetNames` and methods like
`replaceDelegateTargets` to `replaceExceptionTargets`.

I considered `tryTarget`, but the branch/block counterpart name we use
is not `blockTarget` but `branchTarget`, so I chose `exceptionTarget`.

The patch that fixes `rethrow`'s target will follow; this is the
preparation for that.

0 files changed, 0 insertions, 0 deletions