refactor!: Rename command line flags for the sake of consistency

[lenny-goodell]

BREAKING CHANGE: renamed -c/--confdir to -cd/--configDirand -f/--file to -cf/--configFile

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 am not introducing a new dependency (add notes below if you are)
• I have added unit tests for the new feature or bug fix (if not, why?) N/A
• 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?)
  docs: Update docs for changes of renaming config options in 3.0 edgex-docs#916

Testing Instructions

Build service
run ./app-service-configurable -h
verify flags in help have new names
run ./app-service-configurable --confdir something
verify error due to --confdir unknown
run ./app-service-configurable --configDir something
verify error due to file something not found

New Dependency Instructions (If applicable)

[ejlee3]

LGTM!