Add custom property editor (CPE) for Flow invocable actions

[jongpie]

Right now, the 3 Flow invocable actions (FlowLogEntry, FlowRecordLogEntry, and FlowCollectionLogEntry) use the out-of-the-box UI (standard property editor) for configuring the actions. This UI has some limitations:

• As the number of properties on the 3 Flow actions continues to grow, the out-of-the-box UI isn't always intuitive
• It also allows some invalid/bad values to be configured for some properties, resulting in Flow failures. For example, the property loggingLevelName expects a valid enum name from System.LoggingLevel - but in the standard UI, users can enter any text value

To try to overcome some of these limitations + provide a better user experience (UX), the 3 Flow actions should use a new custom property editor LWC.