Revert "chore: remove allow-dangling from symlink-check pipelines"

[rawlingsj]

Reverts #259

Seeing test failures on https://github.com/chainguard-dev/stereo/pull/13223

running step "test/tw/symlink-check"
running step "check for broken/dangling symlinks"
INFO[symlink-check]: Tested [1] symlinks with [symlink-check]. [0/1] passed.

FAILED SYMLINKS:
FAIL[symlink-check]: absolute symlink points to non-existent target: /longhorn-share-manager -> /usr/bin/longhorn-share-manager
Failed to run command "/bin/sh -c 'set -e \n[ -d '\\''/home/build'\\'' ] || mkdir -p '\\''/home/build'\\''\ncd '\\''/home/build'\\''\nsymlink-check \\\n\t--allow-absolute=\"false\" \\\n\t--packages=\"longhorn-share-manager-fips-1.9-compat\"\n\nexit 0'": Process exited with status 1
qemu: sending shutdown signal
ERROR: failed to test package. the test environment has been preserved:
failed to run tests: failed to test package: unable to run pipeline: unable to run pipeline: unable to run pipeline: Process exited with status 1
tests failed

[rawlingsj]

not needed now