[Reliability] Add fallbacks for known Product variation decoding errors

[rachelmcr]

For better resilience to unexpected data when requesting product variations from the API, we should add fallbacks for the following known Swift.DecodingError.typeMismatch errors:

• dimensions.length:

Swift.DecodingError.typeMismatch(Swift.String, Swift.DecodingError.Context(codingPath: [_JSONKey(stringValue: "Index 0", intValue: 0), CodingKeys(stringValue: "dimensions", intValue: nil), CodingKeys(stringValue: "length", intValue: nil)], debugDescription: "Expected to decode String but found a number instead.", underlyingError: nil))

• permalink:

Swift.DecodingError.typeMismatch(Swift.String, Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "data", intValue: nil), _JSONKey(stringValue: "Index 0", intValue: 0), CodingKeys(stringValue: "permalink", intValue: nil)], debugDescription: "Expected to decode String but found a number instead.", underlyingError: nil))

• regular_price:

Swift.DecodingError.typeMismatch(Swift.String, Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "data", intValue: nil), _JSONKey(stringValue: "Index 0", intValue: 0), CodingKeys(stringValue: "regular_price", intValue: nil)], debugDescription: "Expected to decode String but found a number instead.", underlyingError: nil))

• sku:

Swift.DecodingError.typeMismatch(Swift.String, Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "data", intValue: nil), _JSONKey(stringValue: "Index 0", intValue: 0), CodingKeys(stringValue: "sku", intValue: nil)], debugDescription: "Expected to decode String but found a number instead.", underlyingError: nil))

• weight:

Swift.DecodingError.typeMismatch(Swift.String, Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "data", intValue: nil), _JSONKey(stringValue: "Index 0", intValue: 0), CodingKeys(stringValue: "weight", intValue: nil)], debugDescription: "Expected to decode String but found a number instead.", underlyingError: nil))

[rachelmcr]

• Fallback for dimensions.length is in [Reliability] Add fallbacks for known Product decoding errors #9846.
• Fallback for permalink was added in [Products] Decoding error handling for permalink #9233.
• Fallback for regular_price was added in Product variations: Allow alternative type for regular price #4901. (Note: This is an old fix but I confirmed we only saw a single user encounter this decoding error and they were using WCiOS 6.9, an old version from before the fix.)