feat: Replace API route constants

[jinlinGuan]

block by: edgexfoundry/go-mod-core-contracts#965

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• 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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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 70 lines in your changes missing coverage. Please review.

Project coverage is 28.05%. Comparing base (0ef5369) to head (c7830c8).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/support/notifications/router.go	0.00%	20 Missing ⚠️
internal/core/metadata/router.go	0.00%	19 Missing ⚠️
internal/core/data/router.go	0.00%	16 Missing ⚠️
internal/support/scheduler/router.go	0.00%	7 Missing ⚠️
internal/core/keeper/router.go	0.00%	5 Missing ⚠️
internal/core/command/router.go	0.00%	3 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5037   +/-   ##
=======================================
  Coverage   28.05%   28.05%           
=======================================
  Files         243      243           
  Lines       17602    17602           
=======================================
  Hits         4938     4938           
  Misses      11536    11536           
  Partials     1128     1128           

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[cloudxxx8]

LGTM