[charts/portal] Scaling solr to 0 to mitigate log4j vulnerabilities

[melil02]

Description of the change

Scaling solr to 0 to mitigate log4j vulnerability

Benefits

no vulnerability for log4j

Drawbacks

autosuggest won't be available for search

Applicable issues

DE523193: CVE-2021-44228 log4j

Additional information

Checklist

• [X] Chart version bumped in Chart.yaml according to semver.
• [X] Variables are documented in the README.md
• [X] Title of the PR starts with chart name (e.g. [charts/gateway])
• [X] If the chart contains a values-production.yaml apart from values.yaml, ensure that you implement the changes in both files