polish(auth): Fix 'global' script name syntax

Because:
- Using ':' in script name has a specific meaning in yarn workspaces, which denotes a global script.
- We shouldn't repeat test frame functionality with script names.

This Commit:
- Removes the global script
- Removes test:jest:watch, since you can just pass --watch to yarn, ie `yarn test-jest --watch`
- Removes test:jest:coverage, since you can just pass --coverage to the yarn command.

See https://yarnpkg.com/features/workspaces#global-scripts

Author: dschom

packages/fxa-auth-server/package.json

@@ -36,12 +36,10 @@
     "start": "yarn check:mysql && pm2 start pm2.config.js && yarn check:url localhost:9000/__heartbeat__",
     "restart": "pm2 restart pm2.config.js",
     "test": "VERIFIER_VERSION=0 scripts/test-local.sh",
-    "test:jest": "jest --no-coverage --forceExit",
-    "test:jest:unit": "jest --no-coverage --forceExit --testPathIgnorePatterns='verification-reminders'",
-    "test:jest:integration": "jest --no-coverage --forceExit --testPathPattern='verification-reminders'",
-    "test:jest:watch": "jest --watch --no-coverage",
-    "test:jest:coverage": "jest --coverage --forceExit",
-    "test:jest:ci": "JEST_JUNIT_OUTPUT_DIR='../../artifacts/tests/fxa-auth-server' JEST_JUNIT_OUTPUT_NAME='jest-results.xml' jest --coverage --forceExit --ci --reporters=default --reporters=jest-junit",
+    "test-jest": "jest --no-coverage --forceExit",
+    "test-jest-unit": "jest --no-coverage --forceExit --testPathIgnorePatterns='verification-reminders'",
+    "test-jest-integration": "jest --no-coverage --forceExit --testPathPattern='verification-reminders'",
+    "test-jest-ci": "JEST_JUNIT_OUTPUT_DIR='../../artifacts/tests/fxa-auth-server' JEST_JUNIT_OUTPUT_NAME='jest-results.xml' jest --coverage --forceExit --ci --reporters=default --reporters=jest-junit",
     "test-unit": "VERIFIER_VERSION=0 TEST_TYPE=unit scripts/test-ci.sh",
     "test-integration": "VERIFIER_VERSION=0 TEST_TYPE=integration scripts/test-ci.sh",
     "test-integration-v2": "VERIFIER_VERSION=0 TEST_TYPE=integration-v2 scripts/test-ci.sh",