Migrate spec/javascripts/boards/ to Jest

The following test files should be refactored from Karma to Jest:

find spec/javascripts/boards -name '*_spec.js' -exec echo "- [ ] {}" \;

• spec/javascripts/boards/board_new_issue_spec.js (!27607 (merged))
• spec/javascripts/boards/board_list_spec.js (!28317 (merged))
• spec/javascripts/boards/board_card_spec.js (!28317 (merged))
• spec/javascripts/boards/board_blank_state_spec.js (!27607 (merged))
• spec/javascripts/boards/modal_store_spec.js (Already moved!)
• spec/javascripts/boards/list_spec.js (!28317 (merged))
• spec/javascripts/boards/components/board_spec.js
• spec/javascripts/boards/components/board_form_spec.js (!27607 (merged))
• spec/javascripts/boards/components/issue_due_date_spec.js (Already moved!)
• spec/javascripts/boards/components/issue_time_estimate_spec.js (Already moved!)
• spec/javascripts/boards/boards_store_spec.js (Already moved!)
• spec/javascripts/boards/issue_card_spec.js (Already moved!)
• spec/javascripts/boards/issue_spec.js (!27607 (merged))

note: spec/javascripts/boards/components/board_spec.js still exists in the codebase but it will be deleted, it was replaced by: spec/frontend/boards/components/board_column_spec.js