feat: Add volume mounting of eKuiper connections file

[lenny-goodell]

Signed-off-by: Leonard Goodell leonard.goodell@intel.com

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PR Checklist

Please check if your PR fulfills the following requirements:

• I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• I have fully tested (add details below) this the new feature or bug fix (if not, why?)
• I have opened a PR for the related docs change (if not, why?) N/A not needed due to internal impl

Testing Instructions

See edgexfoundry/edgex-go#3778