fix: remove stray CTest artifacts from OR submodule

OR submodule pointer bump: 44712df461 -> 506b437ff2

The prior squashed clamp commit accidentally included two local CTest
output files under src/rsz/test/Testing/Temporary/ (CTestCostData.txt
and LastTest.log) that should never be tracked. Amended the clamp
commit in OpenROAD repo to drop them and force-pushed to
secure-rsz-instance-outside-core. Bumping the pointer here so ORFS
tracks the clean commit.

No functional change.

Signed-off-by: minjukim55 <mkim@precisioninno.com>

Author: minjukim55