#3506209: Patternkit 9.1.2 release

Closes #3506209

added 5 commits

• cd3863aa - 1 commit from branch project:9.1.x
• d3b804ff - Render in an isolated context to capture errors and support bubbling.
• 3c7d7926 - Remove renderer service injection in other services.
• 717b65e0 - Merge branch '9.1.x' into 3506209-patternkit-9.1.2-release
• 4d534893 - Merge branch 'render-contexts' into 3506209-patternkit-9.1.2-release

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added 1 commit

• 0c4dc284 - Wrap error output in better markup structure.

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added 1 commit

• d418e007 - Fix lost bubbling of metadata after isolated render.

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added 1 commit

• 68c88196 - Add automated test to verify attachment bubbling.

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added 1 commit

• c0028396 - Fix test failures from error message markup changes.

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added 1 commit

• c5f6e955 - Fix failing PHPCS warnings.

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merged manually