[BUG] getVisualizationSpec function does not exists but used

[s-zx]

What is the bug?
getVisualizationSpec function was used by security-analytics-dashboards-plugin/public/pages/Correlations/utils/helpers.tsx, but does not exist in security-analytics-dashboards-plugin/public/pages/Overview/utils/helpers.ts.

How can one reproduce the bug?
Steps to reproduce the behavior:

1. Go to file 'security-analytics-dashboards-plugin/public/pages/Correlations/utils/helpers.tsx'
2. getVisualizationSpec function is imported from security-analytics-dashboards-plugin/public/pages/Overview/utils/helpers.ts

What is the expected behavior?
getVisualizationSpec function should be declared in security-analytics-dashboards-plugin/public/pages/Overview/utils/helpers.ts

What is your host/environment?
opensearch-project/security-analytics-dashboards-plugin

Do you have any screenshots?
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Do you have any additional context?
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