[CI] Remove max heap size setting for maven builds on windows

Don't restrict the maximum heap size of maven builds (other than for
native tests) to be consistent on how we build on linux and avoid OoM
errors.

.github/workflows/base-windows.yml

@@ -81,7 +81,6 @@ env:
   MX_PYTHON: python
   QUARKUS_PATH: ${{ github.workspace }}\quarkus
   MANDREL_PACKAGING_REPO: ${{ github.workspace }}\mandrel-packaging
-  MAVEN_OPTS: -Xmx2g -XX:MaxMetaspaceSize=1g
   COLLECTOR_URL: https://collector.foci.life/api/v1/image-stats
 
 jobs:
@@ -403,7 +402,9 @@ jobs:
       - get-jdk
       - get-test-matrix
     runs-on: windows-2022
-    # env:
+    env:
+      # leave more space for the actual native compilation and execution
+      MAVEN_OPTS: -Xmx1g
     #   USE_NATIVE_IMAGE_JAVA_PLATFORM_MODULE_SYSTEM: false
     # Ignore the following YAML Schema error
     timeout-minutes: ${{matrix.timeout}}