chore: Explicitly make our test yamls yaml 1.1 (#2579)

Author: aahung

bin/yaml-format.py

@@ -17,6 +17,9 @@
 from bin._file_formatter import FileFormatter
 
 yaml = YAML()
+# We have pyyaml (5.4) to parse our yamls in this repo,
+# and pyyaml uses Yaml 1.1
+yaml.version = (1, 1)  # type: ignore
 
 
 class YAMLFormatter(FileFormatter):

tests/translator/input/alexa_skill.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 # File: sam.yml
 # Version: 0.9
 

tests/translator/input/alexa_skill_with_skill_id.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 # File: sam.yml
 # Version: 0.9
 

tests/translator/input/all_policy_templates.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 # "Kitchen Sink" test containing all supported policy templates. The idea is to know every one of them is
 # transformable and fail on any changes in the policy template definition without updating the test
 # Since this not about testing the transformation logic, we will keep the policy template parameter values as literal

tests/translator/input/api_cache.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 Resources:
   HtmlFunction:
     Type: AWS::Serverless::Function

tests/translator/input/api_description.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 Resources:
   Function:
     Type: AWS::Serverless::Function

tests/translator/input/api_endpoint_configuration.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 Parameters:
   EndpointConfig:
     Type: String

tests/translator/input/api_endpoint_configuration_with_vpcendpoint.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 Parameters:
   EndpointConfigType:
     Type: String

tests/translator/input/api_http_paths_with_if_condition.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 AWSTemplateFormatVersion: '2010-09-09'
 Transform: AWS::Serverless-2016-10-31
 Description: >

tests/translator/input/api_http_paths_with_if_condition_no_value_else_case.yaml

@@ -1,3 +1,5 @@
+%YAML 1.1
+---
 AWSTemplateFormatVersion: '2010-09-09'
 Transform: AWS::Serverless-2016-10-31
 Description: >