fix(cdk): fix cdk mappings duplicates

[denStrigo]

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• I read and followed the CONTRIBUTING.md guide.
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Short description of what this resolves:

Fix #1544

BREAKING CHANGE:
NbPlatform and NbScrollStrategyOptions from theme/components/cdk/overlay/mapping.ts removed. Use NbPlatform from theme/components/cdk/platform/platform-service.ts and NbScrollStrategyOptions from theme/components/cdk/adapter/block-scroll-strategy-adapter.ts.
NbPlatformModule removed.

[codecov]

Codecov Report

Merging #2068 into master will decrease coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2068      +/-   ##
==========================================
- Coverage   84.73%   84.71%   -0.02%     
==========================================
  Files         235      234       -1     
  Lines        8036     8030       -6     
  Branches      707      707              
==========================================
- Hits         6809     6803       -6     
  Misses       1010     1010              
  Partials      217      217

Impacted Files	Coverage Δ
.../framework/theme/components/cdk/overlay/mapping.ts	96.29% <ø> (-0.38%)	⬇️
...amework/theme/components/cdk/table/table.module.ts	100% <ø> (ø)	⬆️
...rk/theme/components/cdk/overlay/overlay-service.ts	100% <ø> (ø)	⬆️
...k/theme/components/cdk/overlay/overlay-position.ts	95.72% <100%> (+0.03%)	⬆️
.../theme/components/cdk/platform/platform-service.ts	100% <100%> (ø)	⬆️
...omponents/cdk/adapter/scroll-dispatcher-adapter.ts	100% <100%> (ø)	⬆️
...e/components/cdk/adapter/viewport-ruler-adapter.ts	100% <100%> (ø)	⬆️
src/framework/theme/public_api.ts	100% <100%> (ø)	⬆️