Ensure "nullable" fields are rendered correctly in json forms

[travjenkins]

Issues

#1442

Changes

1442

• Get the "nullable" type from the schema and properly create a control for types other than anyOf or oneOf.
• Check for type of string before checking format, secret, etc. to make those functions easier to handle and so they can check the "nullable" types as well

Misc

• Updated how we add date/time formats to the schema to reduce duplication
• Renamed functions that check things on the schema

Tests

Manually tested

• Different schemas

Automated tests

• n/a

Playwright tests ran locally

• Admin
• Captures
• Collections
• HomePage
• Login
• Materialization

Screenshots

Test cases

Used this schema to test

{
  "$schema": "https://json-schema.org/draft/2019-09/schema",
  "title": "EndpointConfig",
  "type": "object",
  "properties": {
    "stringSecret": {
      "title": "String Secret",
      "description": "",
      "type": "string",
      "secret": true
    },
    "stringNullSecret": {
      "title": "String/Null Secret",
      "description": "",
      "type": ["string", "null"],
      "secret": true
    },
    "stringNonSecret": {
      "title": "String NOT Secret",
      "description": "",
      "type": "string"
    },
    "stringNullNonSecret": {
      "title": "String/Null NOT Secret",
      "description": "",
      "type": ["string", "null"]
    },
    "multiLineNullSecret": {
      "title": "MultiLine Null Secret",
      "description": "",
      "type": ["string", "null"],
      "multiline": true,
      "secret": true
    },
    "multiLineNullNonSecret": {
      "title": "MultiLine Null NOT Secret",
      "description": "",
      "type": ["string", "null"],
      "multiline": true
    },
    "multiLineSecret": {
      "title": "MultiLine Secret",
      "description": "",
      "type": "string",
      "multiline": true,
      "secret": true
    },
    "multiLineNonSecret": {
      "title": "MultiLine NOT Secret",
      "description": "",
      "type": "string",
      "multiline": true
    }
  }
}