Deployment scaling configuration changes

[TimCsaky]

Description

some changes to the openshift templates/helm chart to support better scaling of the deployment in production:

• removed cpu and memory limits (following advice, these are handles by the platform)
• added pod disruption budget to ensure continuous uptime during node drains or rescaling
• modified our horizontal pod scaling parameters
• added some more request cpu and memory for the crunchydb postgres nodes

Types of changes

Bug fix (non-breaking change which fixes an issue)

Checklist

• I have read the CONTRIBUTING doc
• I have checked that unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have updated the OpenAPI 3.0 v*.api-spec.yaml documentation (if appropriate)
• I have added necessary documentation (if appropriate)

Further comments

[github-actions]

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