Add model building support for complex type collections

[AndriySvyryd]

Part of #31237

[Copilot]

Copilot reviewed 37 out of 39 changed files in this pull request and generated no comments.

Files not reviewed (2)

• src/EFCore/Properties/CoreStrings.Designer.cs: Language not supported
• src/EFCore/Properties/CoreStrings.resx: Language not supported

Comments suppressed due to low confidence (2)

src/EFCore/Metadata/Internal/ConstructorBindingFactory.cs:267

• The empty array literal '[]' is not valid in C#; consider replacing it with an appropriate initialization such as 'new List()'.

unboundParametersList ??= [];

src/EFCore/Metadata/Builders/EntityTypeBuilder`.cs:1

• The file name 'EntityTypeBuilder`.cs' appears to include a stray backtick; consider renaming it to 'EntityTypeBuilder.cs' for consistency.

// File name: EntityTypeBuilder`.cs

[maumar]

looked mostly at documentation and consistency between all the builders