Revert daily-ci to Azure-Pipelines-1ESPT-ExDShared pool; raise Maven heap to 3g

The 1es-ubuntu-latest-m pool ships deprecated v1 1ES Linux prerequisites which break the network-isolated GitHub checkout. Revert to the previously working pool and address the original heap space failure via MAVEN_OPTS -Xmx3072m instead.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: ramsessanchez

.azure-pipelines/daily-ci-build.yml

@@ -20,7 +20,8 @@ extends:
   template: v1/1ES.Unofficial.PipelineTemplate.yml@1ESPipelineTemplates
   parameters:
     pool:
-      name: 1es-ubuntu-latest-m
+      name: Azure-Pipelines-1ESPT-ExDShared
+      image: ubuntu-latest
       os: linux
     sdl:
       sourceAnalysisPool:
@@ -83,3 +84,4 @@ extends:
                   javaHomeOption: 'JDKVersion'
                   jdkVersionOption: '1.17'
                   jdkArchitectureOption: 'x64'
+                  mavenOptions: '-Xmx3072m'