Location Search and Subject Search inputs are not debounced

[himeshr]

Describe the bug
In DEA, while searching for a Subject or, while create/editing an Individual, for LocationFormElements and SubjectFormElement, we do not debounce the input, and end up invoking a costly search api on the server.
This also leads to poor user experience. We should atleast mitigate server side impact.

To Reproduce
Steps to reproduce the behavior:

Case 1:

1. Go to 'DataEntryApp'
2. Click on 'Register for any SubjectType'
3. Scroll down to 'Address' field
4. Input search string for finding location
5. Developers can check the console Network tab to see the large number of search API calls invoked for one field input for each keystroke

Case 2:
Similar behaviour while searching for Subject using SubjectFormElement.

Expected behavior
We debounce the search and select (location / Subject) calls in DEA.

Developer Checklist(Developer fixing the bug should fill this checklist)

• Does the fix require extensive regression testing?
  • Yes
  • No
• Are you mentioning the required scenarios that could be affected?
  • Yes
  • No

Impact Areas

• DEA (Added Debounce and corrected value set using callback)
  • Subject Search Page - Filter by Location
  • Subject / Encounter / Enrolment / ProgEnc Create / Edit Form - Location select
  • Subject / Encounter / Enrolment / ProgEnc Create / Edit Form - Subject select
  • Household Group Membership Add / Edit - Member select
• App Designer (Minor code clean-up, no change in functionality)
  • CreateEditFilters
  • CreateEditFiltersV2
  • DocumentationSearch
  • LocationSearch
  • CommonSearch
  • LocationTypeSearch
  • ConceptSearch

[himeshr]

Impact Areas

DEA

• Subject Search Page - Filter by Location
• Subject / Encounter / Enrolment / ProgEnc Create / Edit Form - Location select
• Subject / Encounter / Enrolment / ProgEnc Create / Edit Form - Subject select
• Household Group Membership Add / Edit - Member select

App Designer

• CreateEditFilters
• CreateEditFiltersV2
• DocumentationSearch
• LocationSearch
• CommonSearch
• LocationTypeSearch
• ConceptSearch