Add tests for yaml syntax errors (#103908)

.prettierignore

.yamllint

...fixtures/core/config/yaml_errors/basic/configuration.yaml

.../core/config/yaml_errors/basic_include/configuration.yaml

...ig/yaml_errors/basic_include/integrations/iot_domain.yaml

...re/config/yaml_errors/include_dir_list/configuration.yaml

...yaml_errors/include_dir_list/iot_domain/iot_domain_1.yaml

...fig/yaml_errors/include_dir_merge_list/configuration.yaml

...rrors/include_dir_merge_list/iot_domain/iot_domain_1.yaml

...yaml_errors/packages_include_dir_named/configuration.yaml

...s/packages_include_dir_named/integrations/adr_0007_1.yaml

tests/snapshots/test_config.ambr

tests/test_config.py