Speedup CI builds

Only build all binaries on main/release.

Signed-off-by: SuperQ <superq@gmail.com>

.circleci/config.yml

@@ -125,10 +125,21 @@ workflows:
               only: /.*/
       - prometheus/build:
           name: build
-          parallelism: 8
+          parallelism: 3
+          promu_opts: "-p linux/amd64 -p windows/amd64 -p linux/arm64 -p darwin/amd64 -p darwin/arm64 -p linux/386"
           filters:
             tags:
-              only: /.*/
+              ignore: /^v2(\.[0-9]+){2}(-.+|[^-.]*)$/
+            branches:
+              ignore: /^(main|release-.*|.*build-all.*)$/
+      - prometheus/build:
+          name: build_all
+          parallelism: 12
+          filters:
+            branches:
+              only: /^(main|release-.*|.*build-all.*)$/
+            tags:
+              only: /^v2(\.[0-9]+){2}(-.+|[^-.]*)$/
       - mixin:
           filters:
             tags:
@@ -138,7 +149,7 @@ workflows:
           requires:
             - test_frontend
             - test
-            - build
+            - build_all
           filters:
             branches:
               only: main
@@ -147,7 +158,7 @@ workflows:
           requires:
             - test_frontend
             - test
-            - build
+            - build_all
           filters:
             tags:
               only: /^v[0-9]+(\.[0-9]+){2}(-.+|[^-.]*)$/