Revert "Allow symlinks to provide cmd:"

[joshrwolf]

Reverts #1188

[xnox]

Current situation:

# apk add prometheus-config-reloader prometheus-co
nfig-reloader-oci-entrypoint-compat --latest
fetch https://packages.wolfi.dev/os/x86_64/APKINDEX.tar.gz
ERROR: unable to select packages:
  prometheus-config-reloader-0.73.2-r2:
    conflicts: prometheus-config-reloader-oci-entrypoint-compat-0.73.2-r2[cmd:prometheus-config-reloader=0.73.2-r2]
    satisfies: world[prometheus-config-reloader]
  prometheus-config-reloader-oci-entrypoint-compat-0.73.2-r2:
    conflicts: prometheus-config-reloader-0.73.2-r2[cmd:prometheus-config-reloader=0.73.2-r2]
    satisfies: world[prometheus-config-reloader-oci-entrypoint-compat]

with this revert

# apk add prometheus-config-reloader prometheus-config-reloader-oci-entrypoint-compat --latest
fetch https://packages.wolfi.dev/os/x86_64/APKINDEX.tar.gz
(1/2) Installing prometheus-config-reloader (0.73.2-r2)
(2/2) Installing prometheus-config-reloader-oci-entrypoint-compat (0.73.2-r2)
OK: 56 MiB in 16 packages
cc0fe839f5a7:/work/packages# 

it is all good.

[smoser]

For reference, the reversion of this started because of failures seen wolfi-dev/os#18857, wolfi-dev/os#18854, wolfi-dev/os#18853.

Two of them have errors during the apk test disqualified because ... already provides cmd:

I've created chainguard-dev/go-apk#264 as an issue to track the go-apk fix.