[charts/gateway-otk] Otk tolerations

Description of the change add nodeSelector and tolerations to otk chart

Benefits enable select target pool to deploy to based on taint config

Drawbacks none

Applicable issues

Additional information

Checklist

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

CAAPIM / apim-charts