refactor(snap)!: Drop the support for legacy snap env options

[farshidtz]

• Drop the support for legacy snap options with env. prefix
• Upgrade edgex-snap-hooks to v3
• Upgrade edgex-snap-testing Github action to v3
• Add snap's Go module to dependabot
• Other minor refactoring

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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?)
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Testing Instructions

New Dependency Instructions (If applicable)

[MonicaisHer]

@farshidtz Thank you, looks good!

[MonicaisHer]

Could you please also update the interval for helper-go's go mod from weekly to daily?

[codecov-commenter]

Codecov Report

Merging #454 (f91c01f) into main (c9f2a05) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #454   +/-   ##
=======================================
  Coverage   21.34%   21.34%           
=======================================
  Files           5        5           
  Lines         492      492           
=======================================
  Hits          105      105           
  Misses        374      374           
  Partials       13       13           

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