Clean up Formik Usage

[steets250]

Some older form components make use of a container that encompasses a component using the withFormik hook, and ends up splitting a form into multiple components (the actual form, and then the wired up version). I believe it's cleaner and more concise to make use of the <Formik> element to wrap the form and provide inline methods, rather than having to pass everything as props.

This is an example of the withFormik:
Component: https://github.com/acmucsd/membership-portal-ui/blob/master/src/auth/components/SignInForm/index.tsx
Container: https://github.com/acmucsd/membership-portal-ui/blob/master/src/auth/containers/SignInForm.tsx

And this is an example of <Formik>:
https://github.com/acmucsd/membership-portal-ui/blob/master/src/store/components/AdminCollectionPage/index.tsx