Backups for DSE 5.1 clusters fail since DSE support was added in 0.17.0

[alberto-bortolan]

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Medusa 0.17.0 comes with the code changes introduced by #693 : Support DSE (with search)
The change, among other things, takes care of the metadata directory which was introduced in DSE 6.x.
However the code currently only differentiates between DSE and not DSE so it will try to perform a metadata snapshot even with DSE 5.1 and fail with:

[2024-11-29 00:58:43,054] INFO: Creating DSE snapshot
[2024-11-29 00:58:43,055] ERROR: Issue occurred inside handle_backup Name: fournodes01 Error: [Errno 2] No such file or directory: '/var/lib/cassandra/metadata'
[2024-11-29 00:58:43,055] DEBUG: Updated from existing status: 0 to new status: 2 for backup id: fournodes01
[2024-11-29 00:58:43,055] ERROR: Error occurred during backup: [Errno 2] No such file or directory: '/var/lib/cassandra/metadata'

the fix should be quite straightforward using release_version in addition to server_type when deciding if a 'DSE snapshot' is needed

┆Issue is synchronized with this Jira Story by Unito
┆Issue Number: MED-111