Updated to Data connect emulator 1.5.0

[joehan]

Description

Updated to Data connect emulator 1.5.0

Full emulator changelog:

• [changed] Improve error messages of unsupported directives on GQL
• [fixed] Surface GQL errors next on the field lines.
• [changed] Mutations w/o @transaction execute all steps and surface partial errors.
• [added] Generate a Readme for Swift generated code documenting the connector Swift API.
• [fixed] In @auth(expr:) expressions, UUIDs are now converted to strings in the FDC canonical format (32 lower-case hex digits with no delimiters or curly braces).
• [fixed] Generate schema extensions even when the connectors are invalid.
• [fixed] _insertMany now correctly applies column @default values.
• [internal] Remove confusing logs from packageJsonDir when package.json is missing.