Dependencies: Install Oracle Instant Client with dnf

[Geogouz]

Fixes #522.

This installs Oracle Instant Client with dnf in the service and probe images so Oracle thick mode remains available.
It also removes the stale probes/oic.rpm.

[Geogouz]

I am leaving this as a draft till I test also Rucio against a CERN-like Oracle DB (to verify the DB operations work as expected).

P.S. do we know what version ATLAS is using exactly?

[Geogouz]

@bari12 I performed the following test:

• Installed Oracle DB (container-registry.oracle.com/database/enterprise:19.19.0.0)
• Local Oracle DB was set to require encryption/checksum.
• Built server, daemons, init, ui, probes (Rucio 40.4.1 from PyPI in images)
• Installed/loaded Instant Client (23.26.2).
• python-oracledb (3.4.0) switched to thick mode in all images.
• cx_Oracle (8.3.0) loaded Instant Client in probes.
• Thin mode failed as expected: DPY-6005.
• Raw thick mode connected from server, daemons, init, ui.
• Rucio SQLAlchemy get_engine() connected in thick mode for server, daemons, init, ui.
• Probe cx_Oracle connected and run select 1 from dual.
• DB banners confirmed AES256 encryption and SHA512 checksumming.
• Rucio SQLAlchemy write/read/drop worked: write_read_value: ok.

So although this is not a test against a real CERN/ATLAS deployment, I would say it is quite a strong local validation for the thick-client/NNE problem. Maybe a future cleanup could migrate probes from cx_Oracle to python-oracledb, but that is a separate issue not bringing currently problems.

I am going ahead and remove the draft state.