[LogsDB] [Subscription basic] [oracle] Failing test daily: system test: (elastic-agent logs - sysmetric) in oracle.sysmetric

- Stack version: maximum of either the version used in PR builds or 8.17.0 (GA version for LogsDB index mode)
- LogsDB: enabled
- Subscription: basic
- Package: oracle
- Failing test: system test: (elastic-agent logs - sysmetric)
- DataStream: sysmetric
- Owners:
- @elastic/obs-infraobs-integrations

Failure:
```
test case failed: one or more errors found while examining elastic-agent.logs460357656: [0] found error "Unit state changed sql/metrics-default-sql/metrics-oracle-50df1e04-f267-412b-b555-4d937a663995 (HEALTHY->DEGRADED): Error fetching data for metricset sql.query: cannot open connection: testing connection: user=\"sys\" standalone params={authMode:2 connectionClass: connectionClassLength:0 purity:0 newPassword: newPasswordLength:0 appContext: numAppContext:0 externalAuth:0 externalHandle: pool: tag: tagLength:0 matchAnyTag:0 outTag: outTagLength:0 outTagFound:0 shardingKeyColumns: numShardingKeyColumns:0 superShardingKeyColumns: numSuperShardingKeyColumns:0 outNewSession:0}: ORA-12541: TNS:no listener"
```

First build failed: https://buildkite.com/elastic/integrations/builds/40045

Latest 5 failed builds:
- https://buildkite.com/elastic/integrations/builds/49247
- https://buildkite.com/elastic/integrations/builds/49346
- https://buildkite.com/elastic/integrations/builds/49410
- https://buildkite.com/elastic/integrations/builds/49487
- https://buildkite.com/elastic/integrations/builds/49558