fix(renderer): Remove redundant indexing logic from data type validation

[asirvadAbrahamVarghese]

Fixes #(issue) (if applicable)

Description
App throws a runtime error while rendering a field with a schema that contains dataType property

Please include a summary of the change.

dataTypeValidator already performs the indexing and returns the required validator factory function.

getValidate redundantly attempts to access the factory via indexing again(see) - dataTypeValidator(dataType)[dataType]().
Since the value returned by dataTypeValidator is already the resolved factory, this second indexing operation evaluates to undefined, leading to a runtime crash

Removing the redundant second indexing resolves the issue:

Schema (if applicable)

const schema = {
  title: 'Testing dialog',
  description: 'Description of testing Dialog',
  fields: [
    {
      name: 'text_box_8',
      label: 'Text Box integer value',
      title: 'Text Box integer value',
      dataType: 'integer',
      component: componentTypes.TEXT_FIELD,
      type: 'number',
    },
    {
      name: 'text_box_9',
      label: 'Text Box string value',
      title: 'Text Box string value',
      dataType: 'string',
      component: componentTypes.TEXT_FIELD,
    },
  ],
};

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[asirvadAbrahamVarghese]

Since I can’t eliminate the type mismatch, I’m first casting the value to unknown and then explicitly typing it as ValidatorFunction

[Hyperkid123]

Thank you @asirvadAbrahamVarghese for the fix!