Issue #3420653: Add initial ComponentElement extensions

Closes #3420653

added 3 commits

• f4514fa9 - 1 commit from branch project:2.0.x
• 339c1ab0 - ISSUE-3420653: Refactor component render part
• 071766f1 - Issue-3420653: Remove accesing 'ui_patterns' configuration key from consumers

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added 5 commits

• 0d851905 - 1 commit from branch project:2.0.x
• c6b4d621 - Issue #3420653: Add initial ComponentElement extensions
• 3f527a09 - ISSUE-3420653: Refactor component render part
• 4c5a97f0 - ui_patterns_legacy
• 434921ea - PHPCBF

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added 1 commit

• 9a2968af - drupal-check

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added 2 commits

• 37f39b4e - Rename ComponentStoryBuilder to ComponentElementAlter
• 8852fd4f - Clean ui_patterns.module, again

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added 1 commit

• 55511bb6 - ui_patterns_legacy

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merged