[test] Yet more tweaks to remote-run #19130
Merged
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Follow-up to #18966 and #19098 to continue improving the behavior of remote-run:
%t
on the remote machine, so we don't run into artifacts from the last run.%target-swift-reflection-test
into%t
instead of using a hard link. The problem with hard links is that they can be overwritten when the test fails, which would then truncate the original executable to an empty file!