Fix: OPA reduce image size

[maltesander]

Description

part of #961

REPOSITORY                                       TAG                                   IMAGE ID       CREATED             SIZE
oci.stackable.tech/sdp/opa                       1.0.1-stackable25.3.0-reduced-size    fe3a6374d0c6   2 minutes ago       417MB
oci.stackable.tech/sdp/opa                       1.0.1-stackable25.3.0                 9cf54f0be3b9   27 hours ago        477MB

• Does remove the recursive chmod/chown in the final image and attempts non recursive chmod/chown or doing as much as possible in the builder step.
• bundles artifacts in opa builder into /stackable/* to just copy the whole folder in the final image
• Uses check-permissions-ownership script to validate any wrong permissions / ownership in the /stackable folder (example for nifi)

 => [nifi-2_2_0 final  7/10] RUN <<EOF (microdnf update...)                                                                                                                                         8.2s
 => ERROR [nifi-2_2_0 final  8/10] RUN <<EOF (chmod +x /tmp/check-permissions-ownership...)                                                                                                         0.9s
------
 > [nifi-2_2_0 final  8/10] RUN <<EOF (chmod +x /tmp/check-permissions-ownership...):
0.601 Ownership mismatch:  /stackable/nifi (Expected: 1000:0, Found: 0:0)
0.622 Permission mismatch: /stackable/python (Owner: rwx, Group: r-x)
0.624 Permission mismatch: /stackable/bin (Owner: rwx, Group: r-x)
0.628 Permission mismatch: /stackable/nifi-2.2.0 (Owner: rwx, Group: r-x)
0.843 Permission and Ownership checks failed for /stackable!

[siegfriedweber]

LGTM