Enhancement: Add ReadingAccuracy, move away from Accuracy

[gtmills]

The warning the redfish service validator looks like

Accuracy	1.0Deprecated Property Warning: The property is deprecated.	WARN

51c35a8 added Accuracy but since Redfish has deprecated and moved to ReadingAccuracy

            "Accuracy": {
                "deprecated": "This property has been deprecated in favor of ReadingAccuracy.",
                "description": "The estimated percent error of measured versus actual values.",
                "longDescription": "This property shall contain the percent error +/- of the measured versus actual values of the `Reading` property.",
                "readonly": true,
                "type": [
                    "number",
                    "null"
                ],
                "units": "%",
                "versionDeprecated": "v1_8_0"
            },

• Add ReadingAccuracy
• Make a meson option for Accuracy. Set a date to remove completely