Mock all api functions in mocks for tests

src/api/__mocks__/emojiPacks.js

src/api/__mocks__/mediaProxyCache.js

src/api/__mocks__/mediaUpload.js

src/api/__mocks__/moderationLog.js

src/api/__mocks__/relays.js

src/api/__mocks__/reports.js

src/api/__mocks__/settings.js

src/api/__mocks__/status.js

src/api/__mocks__/users.js

src/api/reportsData.js