[stable/fairwinds-insights] Refactor PG and TS secrets to be more align with helm best practices

[vitorvezani]

Why This PR?
a short description of why this PR is needed

Fixes #

Changes
Changes proposed in this pull request:

Checklist:

• I have included the name of the chart in the title of this PR in square brackets i.e. [stable/goldilocks].
• I have updated the chart version in Chart.yaml following Semantic Versioning.
• Any new values are backwards compatible and/or have sensible default.
• Any new values have been added to the README for the Chart, or helm-docs --sort-values-order=file has been run for the charts that support it.

[fairwinds-insights]

Fairwinds Insights - Auto-scan job has failed ❌

View the full report at insights.fairwinds.com.

Show Logs

[fairwinds-insights]

Fairwinds Insights - Auto-scan job has failed ❌

View the full report at insights.fairwinds.com.

Show Logs

found 1 pods for job repo-scan-job-101887
------------------------------------------------
unable to retrieve container logs
Additional info: Repository scan has reached the specified backoff limit; Repository scan has reached the specified backoff limit

[fairwinds-insights]

Fairwinds Insights - Auto-scan job has failed ❌

View the full report at insights.fairwinds.com.

Show Logs

found 1 pods for job repo-scan-job-101889
------------------------------------------------
unable to retrieve container logs
Additional info: Repository scan has reached the specified backoff limit; Repository scan has reached the specified backoff limit

[fairwinds-insights]

Fairwinds Insights - Auto-scan job has failed ❌

View the full report at insights.fairwinds.com.

Show Logs

found 1 pods for job repo-scan-job-101917
------------------------------------------------
unable to retrieve container logs
Additional info: Repository scan has reached the specified backoff limit; Repository scan has reached the specified backoff limit