Fix building x86 Windows native AOT runtime packs (#100512)

Looks like we had a whole extra job definition just to avoid building the native AOT parts in the official build.

eng/pipelines/runtime-official.yml

@@ -65,6 +65,7 @@ extends:
           buildConfig: release
           platforms:
           - windows_x64
+          - windows_x86
           - windows_arm64
           jobParameters:
             templatePath: 'templates-official'
@@ -89,41 +90,6 @@ extends:
               parameters:
                 name: $(osGroup)$(osSubgroup)_$(archType)
 
-
-      #
-      # Build CoreCLR runtime packs
-      # Windows x86
-      # No NativeAOT as NativeAOT is not supported on x86
-      # Sign diagnostic files after native build
-      #
-      - template: /eng/pipelines/common/platform-matrix.yml
-        parameters:
-          jobTemplate: /eng/pipelines/common/global-build-job.yml
-          buildConfig: release
-          platforms:
-          - windows_x86
-          jobParameters:
-            templatePath: 'templates-official'
-            buildArgs: -s clr.runtime+clr.alljits -c $(_BuildConfig) /bl:$(Build.SourcesDirectory)/artifacts/logs/$(_BuildConfig)/CoreClrNativeBuild.binlog
-            nameSuffix: CoreCLR
-            isOfficialBuild: ${{ variables.isOfficialBuild }}
-            timeoutInMinutes: 120
-            postBuildSteps:
-            - template: /eng/pipelines/coreclr/templates/sign-diagnostic-files.yml
-              parameters:
-                basePath: $(Build.SourcesDirectory)/artifacts/bin/coreclr
-                isOfficialBuild: ${{ variables.isOfficialBuild }}
-                timeoutInMinutes: 30
-            # Now that we've signed the diagnostic files, do the rest of the build.
-            - template: /eng/pipelines/common/templates/global-build-step.yml
-              parameters:
-                buildArgs: -s clr.corelib+clr.nativecorelib+clr.tools+clr.packages+libs+host+packs -c $(_BuildConfig)
-                displayName: Build managed CoreCLR components, all libraries, hosts, and packs
-
-            # Upload the results.
-            - template: /eng/pipelines/common/upload-intermediate-artifacts-step.yml
-              parameters:
-                name: $(osGroup)$(osSubgroup)_$(archType)
       #
       # Build CoreCLR runtime packs
       # Mac x64/arm64