Telemetry fix for registry operator deployment

[michael-valdron]

Please specify the area for this PR

operator

What does does this PR do / why we need it:

Corrects the environment variable name for the analytics write key, ANALYTICS_WRITE_KEY to NEXT_PUBLIC_ANALYTICS_WRITE_KEY. This change should fix the broken telemetry.

Additionally these changes include the missing environment variable spec definitions which should of been part of devfile/api#1016.

Which issue(s) this PR fixes:

Fixes #?

part of devfile/api#1006

PR acceptance criteria:

• Test Coverage
  • Are your changes sufficiently tested, and are any applicable test cases added or updated to cover your changes?
• Gosec scans
  • Fix all MEDIUM and higher findings and/or annotate a finding per gosec instructions: https://github.com/securego/gosec#annotating-code to address why a finding is not a security issue

Documentation

• Does the registry operator documentation need to updated with your changes?

How to test changes / Special notes to the reviewer:

[codecov]

Codecov Report

Base: 21.32% // Head: 21.35% // Increases project coverage by +0.03% 🎉

Coverage data is based on head (bc4db8d) compared to base (d6da16a).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
+ Coverage   21.32%   21.35%   +0.03%     
==========================================
  Files          22       22              
  Lines        1163     1180      +17     
==========================================
+ Hits          248      252       +4     
- Misses        905      918      +13     
  Partials       10       10              

Impacted Files	Coverage Δ
pkg/registry/configmap.go	0.00% <0.00%> (ø)
pkg/registry/deployment.go	0.00% <0.00%> (ø)
...rollers/clusterdevfileregistrieslist_controller.go	78.57% <0.00%> (-14.29%)	⬇️
controllers/devfileregistrieslist_controller.go	92.85% <0.00%> (+28.57%)	⬆️

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kim-tsao, michael-valdron

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