[SYCL] Use %t.dir for DeviceImageDependencies tests

[maarquitos14]

Last pulldown pulled the deprecation of %T for llvm-lit, and DeviceImageDependencies tests were using it. It was reported that %t.dir wasn't working for these tests in the pulldown PR (#20343 (comment)), and a workaround was made to make them pass provisionally. This patch moves to %t.dir as it's the standard way after %T removal.

[bader]

@maarquitos14, what about this comment: #20343 (comment)?

[maarquitos14]

@maarquitos14, what about this comment: #20343 (comment)?

My understanding of that comment is that @aelovikov-intel asked to remove those two commands while we were using the workaround, but now that you bring it up I'm not so sure. Please, @aelovikov-intel, can you confirm?

Actually, I think what's missing is the rm command, but let's wait for Andrei's confirmation.

[aelovikov-intel]

%t.dir should come with rm -rf %t.dir ; mkdir -p %t.dir. We couldn't do the rm part when using %t/.. because that would have affected other tests, but now we should add the rm.