During a recent CVE scan we found kube-bench to use `alpine:3.18` as the final image which has a known high CVE.
```
grype aquasec/kube-bench:v0.6.15
✔ Vulnerability DB [no update available]
✔ Loaded image
✔ Parsed image
✔ Cataloged packages [73 packages]
✔ Scanning image... [4 vulnerabilities]
├── 0 critical, 4 high, 0 medium, 0 low, 0 negligible
└── 4 fixed
NAME INSTALLED FIXED-IN TYPE VULNERABILITY SEVERITY
libcrypto3 3.1.0-r4 3.1.1-r0 apk CVE-2023-2650 High
libssl3 3.1.0-r4 3.1.1-r0 apk CVE-2023-2650 High
openssl 3.1.0-r4 3.1.1-r0 apk CVE-2023-2650 High
```
The CVE in question was addressed in the latest [alpine release](https://www.alpinelinux.org/posts/Alpine-3.15.9-3.16.6-3.17.4-3.18.2-released.html), hence updating the dockerfiles accordingly
* chore: publish ubi based image
- added publish step to publish ubi image
- updated base image for alpine based dockerfile
* chore: update pipeline image to ubuntu-latest
