Change ci.yml -> sb-ci.yml (#48953) (#48955)

Author: mmitche

src/SourceBuild/content/eng/pipelines/ci.yml renamed to src/SourceBuild/content/eng/pipelines/sb-ci.yml

@@ -1,33 +1,16 @@
 # This yml is used by these pipelines and triggers:
-# NOTE: the triggers are defined in the Azure DevOps UI as they are too complex
-#
-# - dotnet-source-build (public)
-#   https://dev.azure.com/dnceng-public/public/_build?definitionId=240
-#   - PR: ultralite build
-#   - CI: release/*, every batched commit, full build
-#   - Schedule: main only, full build
-#
-# - dotnet-unified-build (public)
-#   https://dev.azure.com/dnceng-public/public/_build?definitionId=278
-#   - PR: lite build
-#   - CI: release/* only, every batched commit, full build
-#   - Schedule: main only, full build
 #
 # - dotnet-source-build (internal)
 #   https://dev.azure.com/dnceng/internal/_build?definitionId=1219
-#   - PR: ultralite build
 #   - CI: release/* and internal/release/* only, every batched commit, full build
-#   - Schedule: main only, full build
-#
-# - dotnet-source-build-lite (internal)
-#   https://dev.azure.com/dnceng/internal/_build?definitionId=1299
-#   - PR: release/* and main only, lite build, on-demand trigger
-#   - CI: main only, every batched commit, lite build
-#
-# - dotnet-unified-build (internal)
-#   https://dev.azure.com/dnceng/internal/_build?definitionId=1330
-#   - PR: lite build
-#   - CI: release/*, internal/release/* and main only, every batched commit, full build
+
+trigger:
+  batch: true
+  branches:
+    include:
+      - main
+      - release/*
+      - internal/release/*
 
 variables:
 # enable source-only build for pipelines that contain the -source-build string