feat: #60 Adding support for ring deployments

[juanultimate]

It adds support for ring deployments.
Using the Azure App configuration service, the time-tracker-ui is able to enable/disable features to certain users or group of users ( aka role).

[codecov]

Codecov Report

Merging #541 into master will decrease coverage by 0.32%.
The diff coverage is 85.36%.

@@            Coverage Diff             @@
##           master     #541      +/-   ##
==========================================
- Coverage   90.72%   90.40%   -0.33%     
==========================================
  Files          74       80       +6     
  Lines        1402     1428      +26     
  Branches      103      105       +2     
==========================================
+ Hits         1272     1291      +19     
- Misses         91       96       +5     
- Partials       39       41       +2     

Impacted Files	Coverage Δ
...app/modules/login/services/azure.ad.b2c.service.ts	77.77% <0.00%> (-15.56%)	⬇️
...toggles/filters/feature-filter-provider.service.ts	77.77% <77.77%> (ø)
...feature-toggles/feature-toggle-provider.service.ts	90.00% <90.00%> (ø)
src/app/modules/reports/pages/reports.component.ts	100.00% <100.00%> (ø)
.../feature-toggles/feature-toggle-manager.service.ts	100.00% <100.00%> (ø)
...les/shared/feature-toggles/feature-toggle.model.ts	100.00% <100.00%> (ø)
...ed/feature-toggles/filters/feature-filter-types.ts	100.00% <100.00%> (ø)
...ilters/targeting/targeting-feature-filter.model.ts	100.00% <100.00%> (ø)
...modules/shared/components/clock/clock.component.ts	91.66% <0.00%> (-8.34%)	⬇️
.../components/entry-fields/entry-fields.component.ts	100.00% <0.00%> (ø)
... and 6 more

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