[chore] Prepare release v1.43.0/v0.137.0 (open-telemetry#13933)

The following commands were run to prepare this release:
- make chlog-update VERSION=v1.43.0/v0.137.0
- make prepare-release PREVIOUS_VERSION=1[.]42[.]0
RELEASE_CANDIDATE=1.43.0 MODSET=stable
- make prepare-release PREVIOUS_VERSION=0[.]136[.]0
RELEASE_CANDIDATE=0.137.0 MODSET=beta

---------

Co-authored-by: otelbot <197425009+otelbot@users.noreply.github.com>
Co-authored-by: Dmitrii Anoshin <anoshindx@gmail.com>

Author: otelbot[bot]

.chloggen/control-attribute-enabled.yaml

@@ -7,6 +7,29 @@ If you are looking for user-facing changes, check out [CHANGELOG.md](./CHANGELOG
 
 <!-- next version -->
 
+## v1.43.0/v0.137.0
+
+### 🛑 Breaking changes 🛑
+
+- `pkg/exporterhelper`: Remove all experimental symbols in exporterhelper (#11143)
+  They have all been moved to xexporterhelper
+  
+
+### 🚩 Deprecations 🚩
+
+- `all`: service/telemetry.TracesConfig is deprecated (#13904)
+  This type alias has been added to otelconftelemetry.TracesConfig,
+  where the otelconf-based telemetry implementation now lives.
+  
+
+### 💡 Enhancements 💡
+
+- `all`: Mark configoptional as stable (#13403)
+- `all`: Mark configauth module as 1.0 (#9476)
+- `pkg/pdata`: Mark featuregate pdata.useCustomProtoEncoding as stable (#13883)
+
+<!-- previous-version -->
+
 ## v1.42.0/v0.136.0
 
 ### 🛑 Breaking changes 🛑

.chloggen/mowies-standardize-chloggen-components.yaml

@@ -7,6 +7,20 @@ If you are looking for developer-facing changes, check out [CHANGELOG-API.md](./
 
 <!-- next version -->
 
+## v1.43.0/v0.137.0
+
+### 💡 Enhancements 💡
+
+- `cmd/mdatagen`: Improve validation for resource attribute `enabled` field in metadata files (#12722)
+  Resource attributes now require an explicit `enabled` field in metadata.yaml files, while regular attributes
+  are prohibited from having this field. This improves validation and prevents configuration errors.
+  
+- `all`: Changelog entries will now have their component field checked against a list of valid components. (#13924)
+  This will ensure a more standardized changelog format which makes it easier to parse.
+- `pkg/pdata`: Mark featuregate pdata.useCustomProtoEncoding as stable (#13883)
+
+<!-- previous-version -->
+
 ## v1.42.0/v0.136.0
 
 ### 💡 Enhancements 💡

.chloggen/mx-psi_configoptional-1.0.yaml

@@ -4,8 +4,8 @@ go 1.24.0
 
 require (
 	github.com/stretchr/testify v1.11.1
-	go.opentelemetry.io/collector/consumer v1.42.0
-	go.opentelemetry.io/collector/pdata v1.42.0
+	go.opentelemetry.io/collector/consumer v1.43.0
+	go.opentelemetry.io/collector/pdata v1.43.0
 	go.uber.org/goleak v1.3.0
 )
 
@@ -17,7 +17,7 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	go.opentelemetry.io/collector/featuregate v1.42.0 // indirect
+	go.opentelemetry.io/collector/featuregate v1.43.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/net v0.41.0 // indirect
 	golang.org/x/sys v0.33.0 // indirect