[DEA] Add ability to input values for subject concept

[mahalakshme]

Need

Currently subject concept is not supported in DEA though supported in mobile app

Current status:

Display of values of subject datatype(both single and multiselect) working currently

How it is working in mobile currently - for multiselect:
https://github.com/avniproject/avni-webapp/assets/10369963/e49b632c-0224-4287-a6d8-ac5e9852bce3

How it is working in mobile currently - for singleselect:
https://github.com/avniproject/avni-webapp/assets/10369963/9698e9f4-ed70-40c2-a4f6-5d9c4eedbf1d

When 'Search option' enabled in App Designer, DEA breaks. This doesn't seem to be useful from the description provided here.

DEA working with 'Display all group members' enabled - multiselect and 'single select'.

Fun fact:

Our Joy has already worked on this in 2020: https://app.zenhub.com/workspaces/avni-product-deprecated-635b73bded85e50018871ae6/issues/gh/avniproject/avni-webapp/474

Acceptance criteria:

• Remove 'Search option' in App Designer.

• How it should work for multiselect:

• How it should work for singleselect:

• single select - multiselect

• search

• rules

Out of scope:

Supporting option for 'Display all group members' in DEA.