feat(Grid|Image): move styles to base theme

[mnajdova]

Moved Grid's and Image's styles and variables to base theme. Added circularRadius variable in the Image's variables.

[codecov]

Codecov Report

Merging #1182 into master will decrease coverage by <.01%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master    #1182      +/-   ##
==========================================
- Coverage   82.46%   82.46%   -0.01%     
==========================================
  Files         735      735              
  Lines        8724     8723       -1     
  Branches     1169     1235      +66     
==========================================
- Hits         7194     7193       -1     
  Misses       1514     1514              
  Partials       16       16

Impacted Files	Coverage Δ
packages/react/src/themes/teams/componentStyles.ts	100% <ø> (ø)	⬆️
...kages/react/src/themes/teams/componentVariables.ts	100% <ø> (ø)	⬆️
...t/src/themes/base/components/Grid/gridVariables.ts	100% <ø> (ø)
...eact/src/themes/base/components/Grid/gridStyles.ts	13.33% <ø> (ø)
...src/themes/base/components/Image/imageVariables.ts	100% <ø> (ø)
...ct/src/themes/base/components/Image/imageStyles.ts	14.28% <0%> (ø)
...ckages/react/src/themes/base/componentVariables.ts	100% <100%> (ø)	⬆️
packages/react/src/themes/base/componentStyles.ts	100% <100%> (ø)	⬆️

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[layershifter]

CHANGELOG? 🤔