Revert "build: pool with larger mem sku (#3122)" (#3123)

This reverts commit 806ee0e.

Author: MIchaelMainer

.azure-pipelines/ci-build.yml

@@ -2,6 +2,9 @@
 # Licensed under the MIT License.
 name: $(BuildDefinitionName)_$(SourceBranchName)_$(Date:yyyyMMdd)$(Rev:.r)
 trigger:
+  branches:
+    include:
+    - main
   paths:
     include:
       - src/*
@@ -21,7 +24,10 @@ resources:
 extends:
   template: v1/1ES.Official.PipelineTemplate.yml@1ESPipelineTemplates
   parameters:
-    pool: 1es-windows-ps-compute-m
+    pool:
+      name: Azure-Pipelines-1ESPT-ExDShared
+      image: windows-latest
+      os: windows
     sdl:
       git: # Customize checkout to enable longpaths in git for the paralled sdl https://eng.ms/docs/cloud-ai-platform/devdiv/one-engineering-system-1es/1es-docs/1es-pipeline-templates/features/sdlanalysis/sourceanalysisstage
         longpaths: true