[Backport 1.10.latest] Source Overrides Deprecation (#11802)

* Source Override Deprecation (#11636)

* First draft of SourceOverrideDeprecation warning.

* Refinements and test

* Back out unneeded change`

* Fix unit test.

* add changie doc

* Bump minimum dbt-protos to 1.0.335

---------

Co-authored-by: Quigley Malcolm <[email protected]>

* Update json schemas (#11800)

* Update dbt_project.yml jsonschema spec to handle nested config defs

Additionally adds some more cloud configs

* Update schema files jsonschema definition to not have `overrides` for sources

Additionally add some cloud definitions

* Add changie doc

* Update happy_path fixture to include nested config specifations in dbt_project.yml

* Move source overrides deprecation to jsonschema (#11801)

* Improve deprecation message for SourceOverrideDeprecation

* Move SourceOverrideDeprecation to jsonschema validation code path

* Update test for checking SourceOverrideDeprecation

---------

Co-authored-by: Peter Webb <[email protected]>

Author: QMalcolm

.changes/unreleased/Features-20250701-164957.yaml

@@ -0,0 +1,6 @@
+kind: Features
+body: Deprecate `overrides` property for sources
+time: 2025-07-01T16:49:57.979871-05:00
+custom:
+  Author: peterallenwebb
+  Issue: "11566"

.changes/unreleased/Fixes-20250707-103418.yaml

@@ -0,0 +1,7 @@
+kind: Fixes
+body: Update jsonschema definitions with nested config defs, cloud info, and dropping
+  source overrides
+time: 2025-07-07T10:34:18.982725-05:00
+custom:
+  Author: QMalcolm
+  Issue: N/A

core/dbt/deprecations.py

@@ -189,6 +189,11 @@ class CustomOutputPathInSourceFreshnessDeprecation(DBTDeprecation):
     _event = "CustomOutputPathInSourceFreshnessDeprecation"
 
 
+class SourceOverrideDeprecation(DBTDeprecation):
+    _name = "source-override-deprecation"
+    _event = "SourceOverrideDeprecation"
+
+
 class PropertyMovedToConfigDeprecation(DBTDeprecation):
     _name = "property-moved-to-config-deprecation"
     _event = "PropertyMovedToConfigDeprecation"
@@ -279,6 +284,7 @@ def show_deprecations_summary() -> None:
     PropertyMovedToConfigDeprecation(),
     ModelParamUsageDeprecation(),
     WEOInlcudeExcludeDeprecation(),
+    SourceOverrideDeprecation(),
 ]
 
 deprecations: Dict[str, DBTDeprecation] = {d.name: d for d in deprecations_list}

core/dbt/events/types.py

@@ -713,6 +713,15 @@ def message(self) -> str:
         return line_wrap_message(deprecation_tag(description))
 
 
+class SourceOverrideDeprecation(WarnLevel):
+    def code(self) -> str:
+        return "D035"
+
+    def message(self) -> str:
+        description = f"The source property `overrides` is deprecated but was found on source `{self.source_name}` in file `{self.file}`. Instead, `enabled` should be used to disable the unwanted source."
+        return line_wrap_message(deprecation_tag(description))
+
+
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 # I - Project parsing
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