fix: Don't register spiffe token provider service

[bnevis-i]

go-mod-bootstrap only allows registration of HTTP healtchecks with consul, which will not work for this service, as it requires clients have a client TLS certificate

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PR Checklist

Please check if your PR fulfills the following requirements:

• [X] I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• [X] 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

make delayed-start ds-virtual

Thence, go to http://localhost:8500/ui/dc1/services and verify no failing health check for edgex-security-spiffe-token-provider