refactor(snap): Remove obsolete parts, upgrade Go, build nginx

[farshidtz]

• Remove parts, layout, etc left-over from the removed kong and postgres apps ( feat(security)!: Implementation of JWT authentication ADR #4244)
• Remove obsolete minimal build scripts
• Remove unused drop daemon script
• Remove obsolete passthroughs
• Upgrade Go from 1.18 to 1.20
• Add command to build nginx using the default process
• Set the nginx source to release-1.23.3 with shallow clone
• Bump epoch for the v2 to v3 edgex backward-incompatible upgrade

If your build fails due to your commit message not passing the build checks, please review the guidelines here: https://github.com/edgexfoundry/edgex-go/blob/main/.github/Contributing.md

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?)

Testing Instructions

New Dependency Instructions (If applicable)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
2.3% Duplication

[codecov-commenter]

Codecov Report

Merging #4439 (6c3c222) into main (b04a3d3) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main    #4439   +/-   ##
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  Coverage   41.73%   41.73%           
=======================================
  Files         106      106           
  Lines        9749     9749           
=======================================
  Hits         4069     4069           
  Misses       5333     5333           
  Partials      347      347           

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[bnevis-i]

Passed build test. Looks OK.

[lenny-goodell]

LGTM