feat!: change bedrock bearer token variable to match AWS docs

Rename AWS_BEDROCK_API_KEY to AWS_BEARER_TOKEN_BEDROCK to align
with the naming convention used in AWS Bedrock documentation and
the AWS web console UI. This reduces confusion when developers
compare LLS docs with AWS docs.

Also rename the Python field aws_bedrock_api_key to
aws_bearer_token_bedrock throughout the codebase for consistency.

src/llama_stack/distributions/ci-tests/run-with-postgres-store.yaml

@@ -47,7 +47,7 @@ providers:
   - provider_id: bedrock
     provider_type: remote::bedrock
     config:
-      api_key: ${env.AWS_BEDROCK_API_KEY:=}
+      api_key: ${env.AWS_BEARER_TOKEN_BEDROCK:=}
       region_name: ${env.AWS_DEFAULT_REGION:=us-east-2}
   - provider_id: ${env.NVIDIA_API_KEY:+nvidia}
     provider_type: remote::nvidia

src/llama_stack/distributions/ci-tests/run.yaml

@@ -47,7 +47,7 @@ providers:
   - provider_id: bedrock
     provider_type: remote::bedrock
     config:
-      api_key: ${env.AWS_BEDROCK_API_KEY:=}
+      api_key: ${env.AWS_BEARER_TOKEN_BEDROCK:=}
       region_name: ${env.AWS_DEFAULT_REGION:=us-east-2}
   - provider_id: ${env.NVIDIA_API_KEY:+nvidia}
     provider_type: remote::nvidia

src/llama_stack/distributions/starter-gpu/run-with-postgres-store.yaml

@@ -47,7 +47,7 @@ providers:
   - provider_id: bedrock
     provider_type: remote::bedrock
     config:
-      api_key: ${env.AWS_BEDROCK_API_KEY:=}
+      api_key: ${env.AWS_BEARER_TOKEN_BEDROCK:=}
       region_name: ${env.AWS_DEFAULT_REGION:=us-east-2}
   - provider_id: ${env.NVIDIA_API_KEY:+nvidia}
     provider_type: remote::nvidia

src/llama_stack/distributions/starter-gpu/run.yaml

@@ -47,7 +47,7 @@ providers:
   - provider_id: bedrock
     provider_type: remote::bedrock
     config:
-      api_key: ${env.AWS_BEDROCK_API_KEY:=}
+      api_key: ${env.AWS_BEARER_TOKEN_BEDROCK:=}
       region_name: ${env.AWS_DEFAULT_REGION:=us-east-2}
   - provider_id: ${env.NVIDIA_API_KEY:+nvidia}
     provider_type: remote::nvidia

src/llama_stack/distributions/starter/run-with-postgres-store.yaml

@@ -47,7 +47,7 @@ providers:
   - provider_id: bedrock
     provider_type: remote::bedrock
     config:
-      api_key: ${env.AWS_BEDROCK_API_KEY:=}
+      api_key: ${env.AWS_BEARER_TOKEN_BEDROCK:=}
       region_name: ${env.AWS_DEFAULT_REGION:=us-east-2}
   - provider_id: ${env.NVIDIA_API_KEY:+nvidia}
     provider_type: remote::nvidia

src/llama_stack/distributions/starter/run.yaml

@@ -47,7 +47,7 @@ providers:
   - provider_id: bedrock
     provider_type: remote::bedrock
     config:
-      api_key: ${env.AWS_BEDROCK_API_KEY:=}
+      api_key: ${env.AWS_BEARER_TOKEN_BEDROCK:=}
       region_name: ${env.AWS_DEFAULT_REGION:=us-east-2}
   - provider_id: ${env.NVIDIA_API_KEY:+nvidia}
     provider_type: remote::nvidia

src/llama_stack/providers/remote/inference/bedrock/bedrock.py

@@ -37,7 +37,7 @@ class BedrockInferenceAdapter(OpenAIMixin):
     """
 
     config: BedrockConfig
-    provider_data_api_key_field: str = "aws_bedrock_api_key"
+    provider_data_api_key_field: str = "aws_bearer_token_bedrock"
 
     def get_base_url(self) -> str:
         """Get base URL for OpenAI client."""
@@ -111,7 +111,7 @@ class BedrockInferenceAdapter(OpenAIMixin):
                 logger.error(f"AWS Bedrock authentication token expired: {error_msg}")
                 raise ValueError(
                     "AWS Bedrock authentication failed: Bearer token has expired. "
-                    "The AWS_BEDROCK_API_KEY environment variable contains an expired pre-signed URL. "
+                    "The AWS_BEARER_TOKEN_BEDROCK environment variable contains an expired pre-signed URL. "
                     "Please refresh your token by generating a new pre-signed URL with AWS credentials. "
                     "Refer to AWS Bedrock documentation for details on OpenAI-compatible endpoints."
                 ) from e

src/llama_stack/providers/remote/inference/bedrock/config.py

@@ -12,9 +12,9 @@ from llama_stack.providers.utils.inference.model_registry import RemoteInference
 
 
 class BedrockProviderDataValidator(BaseModel):
-    aws_bedrock_api_key: str | None = Field(
+    aws_bearer_token_bedrock: str | None = Field(
         default=None,
-        description="API key for Amazon Bedrock",
+        description="API Key (Bearer token) for Amazon Bedrock",
     )
 
 
@@ -27,6 +27,6 @@ class BedrockConfig(RemoteInferenceProviderConfig):
     @classmethod
     def sample_run_config(cls, **kwargs):
         return {
-            "api_key": "${env.AWS_BEDROCK_API_KEY:=}",
+            "api_key": "${env.AWS_BEARER_TOKEN_BEDROCK:=}",
             "region_name": "${env.AWS_DEFAULT_REGION:=us-east-2}",
         }