feat: Add -d/--dev common command-line flag to put service in Dev Mode

[lenny-goodell]

Dev Mode is used when running service locally with the other services running in Docker (aka hybrid mode). This causes all the Host settings pulled from common configuration to be overridden with the value localhost.

closes #509

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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?)
• 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?)
  TBD

Testing Instructions

Use in edgex-go, app sdk and device sdk and make appropriate code changes
Build and run core/support services with "-cp -d" options with other services running in docker
Verify service bootstraps properly
Build and run device-simple with "-cp -d" options with other services running in docker
Verify service bootstraps properly
Build and run app-template with "-cp -d" options with other services running in docker
Verify service bootstraps properly

New Dependency Instructions (If applicable)

[codecov-commenter]

Codecov Report

Merging #516 (131c82f) into main (de96246) will decrease coverage by 0.43%.
The diff coverage is 28.00%.

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@@            Coverage Diff             @@
##             main     #516      +/-   ##
==========================================
- Coverage   58.30%   57.88%   -0.43%     
==========================================
  Files          27       27              
  Lines        2168     2189      +21     
==========================================
+ Hits         1264     1267       +3     
- Misses        824      842      +18     
  Partials       80       80              

Impacted Files	Coverage Δ
bootstrap/config/config.go	31.37% <0.00%> (-0.81%)	⬇️
config/types.go	12.76% <ø> (ø)
bootstrap/flags/flags.go	60.00% <33.33%> (-2.32%)	⬇️
bootstrap/handlers/clients.go	98.90% <100.00%> (+0.01%)	⬆️
bootstrap/handlers/messaging.go	78.37% <100.00%> (ø)

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[jim-wang-intel]

LGTM

[cloudxxx8]

LGTM