feat!: change bedrock bearer token env variable to match AWS docs & boto3 convention (#4152)

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.

Closes #4147

tests/unit/providers/inference/test_bedrock_adapter.py

@@ -40,8 +40,8 @@ def test_api_key_from_header_overrides_config():
     """Test API key from request header overrides config via client property"""
     config = BedrockConfig(api_key="config-key", region_name="us-east-1")
     adapter = BedrockInferenceAdapter(config=config)
-    adapter.provider_data_api_key_field = "aws_bedrock_api_key"
-    adapter.get_request_provider_data = MagicMock(return_value=SimpleNamespace(aws_bedrock_api_key="header-key"))
+    adapter.provider_data_api_key_field = "aws_bearer_token_bedrock"
+    adapter.get_request_provider_data = MagicMock(return_value=SimpleNamespace(aws_bearer_token_bedrock="header-key"))
 
     # The client property is where header override happens (in OpenAIMixin)
     assert adapter.client.api_key == "header-key"

tests/unit/providers/inference/test_bedrock_config.py

@@ -9,7 +9,7 @@ from llama_stack.providers.remote.inference.bedrock.config import BedrockConfig
 
 def test_bedrock_config_defaults_no_env(monkeypatch):
     """Test BedrockConfig defaults when env vars are not set"""
-    monkeypatch.delenv("AWS_BEDROCK_API_KEY", raising=False)
+    monkeypatch.delenv("AWS_BEARER_TOKEN_BEDROCK", raising=False)
     monkeypatch.delenv("AWS_DEFAULT_REGION", raising=False)
     config = BedrockConfig()
     assert config.auth_credential is None
@@ -35,5 +35,5 @@ def test_bedrock_config_sample():
     sample = BedrockConfig.sample_run_config()
     assert "api_key" in sample
     assert "region_name" in sample
-    assert sample["api_key"] == "${env.AWS_BEDROCK_API_KEY:=}"
+    assert sample["api_key"] == "${env.AWS_BEARER_TOKEN_BEDROCK:=}"
     assert sample["region_name"] == "${env.AWS_DEFAULT_REGION:=us-east-2}"