Rename yarn build-combined to just yarn build

It's confusing to new contributors, and me, that you're supposed to use `yarn build-combined` for almost everything but not fixtures.

We should use only one build command for everything.

.circleci/config.yml

@@ -110,14 +110,14 @@ jobs:
           paths:
             - build
 
-  yarn_build_combined:
+  yarn_build:
     docker: *docker
     environment: *environment
     parallelism: 40
     steps:
       - checkout
       - setup_node_modules
-      - run: yarn build-combined
+      - run: yarn build
       - persist_to_workspace:
           root: .
           paths:
@@ -451,7 +451,7 @@ workflows:
                 # TODO: Test more persistent configurations?
                 - '-r=stable --env=development --persistent'
                 - '-r=experimental --env=development --persistent'
-      - yarn_build_combined:
+      - yarn_build:
           filters:
             branches:
               ignore:
@@ -464,10 +464,10 @@ workflows:
       - process_artifacts_combined:
           requires:
             - scrape_warning_messages
-            - yarn_build_combined
+            - yarn_build
       - yarn_test_build:
           requires:
-            - yarn_build_combined
+            - yarn_build
           matrix:
             parameters:
               args:
@@ -506,22 +506,22 @@ workflows:
                 - main
           requires:
             - download_base_build_for_sizebot
-            - yarn_build_combined
+            - yarn_build
       - yarn_lint_build:
           requires:
-            - yarn_build_combined
+            - yarn_build
       - yarn_check_release_dependencies:
           requires:
-            - yarn_build_combined
+            - yarn_build
       - check_error_codes:
           requires:
-            - yarn_build_combined
+            - yarn_build
       - RELEASE_CHANNEL_stable_yarn_test_dom_fixtures:
           requires:
-            - yarn_build_combined
+            - yarn_build
       - build_devtools_and_process_artifacts:
           requires:
-            - yarn_build_combined
+            - yarn_build
       - run_devtools_e2e_tests:
           requires:
             - build_devtools_and_process_artifacts

package.json

@@ -108,8 +108,8 @@
     "testRegex": "/scripts/jest/dont-run-jest-directly\\.js$"
   },
   "scripts": {
-    "build": "node ./scripts/rollup/build.js",
-    "build-combined": "node ./scripts/rollup/build-all-release-channels.js",
+    "build": "node ./scripts/rollup/build-all-release-channels.js",
+    "build-combined": "echo 'build-combined is deprecated. yarn build instead.'",
     "build-for-devtools": "cross-env RELEASE_CHANNEL=experimental yarn build react/index,react/jsx,react-dom/index,react-dom/unstable_testing,react-dom/test-utils,react-is,react-debug-tools,scheduler,react-test-renderer,react-refresh,react-art --type=NODE && cp -r ./build/node_modules build/oss-experimental/",
     "build-for-devtools-dev": "yarn build-for-devtools --type=NODE_DEV",
     "build-for-devtools-prod": "yarn build-for-devtools --type=NODE_PROD",