Ensure that types of ignored or inaccessible properties are not included by the source generator.

[eiriktsarpalis]

Makes the following changes:

1. Ensures that types of ignored/private properties are not included by the source generator.
2. Refactors the property conflict resolution algorithm so that it is line-by-line equivalent to the reflection variant for consistency and making future changes easier to maintain.
3. Refactors the SG object parsing logic into distinct methods for constructor, property and property initializer resolution.
4. Avoids the use of ISymbol.ToDisplayString() in a few places when doing property and interface resolution.

Fix #76919.

[ghost]

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Issue Details

---

Makes the following changes:

1. Ensures that types of ignored/private properties are not included by the source generator.
2. Refactors the property conflict resolution algorithm so that it is line-by-line equivalent to the reflection variant for consistency and making future changes easier to maintain.
3. Refactors the SG object parsing logic into distinct methods for constructor, property and property initializer resolution.
4. Avoids the use of ISymbol.ToDisplayString() in a few places when doing property and interface resolution.

Fix #76919.

Author:	eiriktsarpalis
Assignees:	-
Labels:	area-System.Text.Json
Milestone:	-

[krwq]

LGTM