Allow grouping assets without preprocessing.

Closes #3416508

added 778 commits

• 0a5af765...10154d1a - 777 commits from branch project:11.x
• 6807527e - Merge branch drupal:11.x into 3416508-improvejs-collection-optimizer-lazy

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added 515 commits

• 6807527e...d171bb91 - 514 commits from branch project:11.x
• 3649f900 - Allow grouping assets without preprocessing.

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added 1 commit

• ef07f56b - Use asserts instead of if cases

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added 1 commit

• ec9132e2 - Fix asserts

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added 27 commits

• ec9132e2...fb24b240 - 26 commits from branch project:11.x
• 51022805 - Merge branch drupal:11.x into 3416508-improvejs-collection-optimizer-lazy

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marked this merge request as ready