#3443882 "Allow supplemental plugin attributes"

Closes #3443882

added 308 commits

• 52d05cb7...89278799 - 305 commits from branch project:11.x
• eef47d74 - Added plugin extender attribute base class.
• c51c44de - Added Field UI entity type extension.
• 7f5074a0 - WIP added discovery of plugin extensions to attribute discovery.

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added 5 commits

• a500eda5 - Renamed variable for clarity.
• 515383d2 - Added attribute class for deprecated properties.
• 3a97bd0c - Added temporary setting of 3rd-party values, for testing.
• c7914a07 - Added bypass of collision check for deprecated properties.
• 9a55ad5c - Added test.

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added 1 commit

• c680b589 - Added test.

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added 30 commits

• c680b589...2e311a8d - 22 commits from branch project:11.x
• c2b6623f - Added plugin extender attribute base class.
• 21398d26 - Added Field UI entity type extension.
• 971999fb - WIP added discovery of plugin extensions to attribute discovery.
• 8634370e - Renamed variable for clarity.
• 5d6b6277 - Added attribute class for deprecated properties.
• ec89f29c - Added temporary setting of 3rd-party values, for testing.
• 19ca0114 - Added bypass of collision check for deprecated properties.
• edb1b5cc - Added test.

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marked this merge request as ready

added 5 commits

• b6bb028f - Removed obsolete TODO.
• e6b1aedd - Only get third-party attributes if we found a main attribute.
• e12c44c9 - Fixed missing docs.
• d8d2a35c - Changed terminology.
• 0f4214ef - Added detail to exception message; fixed parameters.

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added 1 commit

• 38d5e752 - Fixed spelling.

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added 386 commits

• 38d5e752...4b25dc76 - 372 commits from branch project:11.x
• 4b25dc76...5b8f3d17 - 4 earlier commits
• e6968594 - Added attribute class for deprecated properties.
• de3bc300 - Added temporary setting of 3rd-party values, for testing.
• 005126ce - Added bypass of collision check for deprecated properties.
• 18bca88f - Added test.
• fc8add6a - Removed obsolete TODO.
• 25d431e6 - Only get third-party attributes if we found a main attribute.
• 5accc3be - Fixed missing docs.
• bffc1382 - Changed terminology.
• 47dc5586 - Added detail to exception message; fixed parameters.
• a5d49949 - Fixed spelling.

Compare with previous version