Allow actions to read BUILD_BROKEN_INCORRECT_PARTITION_IMAGES

To maintain good backwards compatibility with the legacy partition
building behavior, allow actions to read
BUILD_BROKEN_INCORRECT_PARTITION_IMAGES so that we don't have to rerun
analysis.

Bug: 205632228
Test: Presubmits
Change-Id: I2b55c0143cbdaf010e6b5fd0c3d51d6930a94eff