Add setter/getter for encryption key name in cta-admin tapepool

Problem

At the moment there is an ENCRYPTION_KEY_NAME field in the TAPE_POOL table of the CTA Catalogue, but we do not have the logic to set, get or use this value inside the CTA code:

• https://gitlab.cern.ch/cta/cta-catalogue-schema/-/blob/ae7671e0/common_catalogue_schema.sql#L121
• #137 (closed)

Instead, we rely on the cta-get-encryption-key-puppet.py script to return the encryption key name based on the tape pool name:

• https://gitlab.cern.ch/cta/operations/-/issues/1613#note_9151566

Expected solution

• Add the option to get/set the ENCRYPTION_KEY_NAME value on the tape pool with the cta-admin tp command. Modify CTA to use this value when archiving files to new tapes.
• Deprecate the usage of the option --pool-name test_encryption from the cta-get-encryption-key-puppet.py script.
• Allow CTA to directly key the encryption key from the .json file.

References

CTA Ops docs on encryption:

• https://tapeoperations.docs.cern.ch/ctaops/data_encryption_and_permissions/cta_encryption_logic/