Global: Rename default_linux_image to default_linux_container

Now that we have introduced default_linux_vm, the naming becomes
somewhat confusing, since there are two different images specified
for two different reasons.

By naming one of them _vm and the other _container
we surface their intended usage in their variable name.

Continuous-integration-options: PatchCheck.ignore-multi-package

Signed-off-by: Mike Beaton <mjsbeaton@gmail.com>

.azurepipelines/Ubuntu-GCC.yml

@@ -29,6 +29,6 @@ jobs:
   parameters:
     tool_chain_tag: GCC
     vm_image: ${{ variables.default_linux_vm }}
-    container: ${{ variables.default_linux_image }}
+    container: ${{ variables.default_linux_container }}
     arch_list: "IA32,X64,AARCH64,RISCV64,LOONGARCH64"
     usePythonVersion: ''  # use Python from the container image

.azurepipelines/templates/defaults.yml

@@ -9,6 +9,6 @@
 
 variables:
   default_python_version: "3.12"
-  default_linux_image: "ghcr.io/tianocore/containers/fedora-43-test:bde74f8"
+  default_linux_container: "ghcr.io/tianocore/containers/fedora-43-test:bde74f8"
   default_linux_vm: "ubuntu-24.04"
   default_windows_vm: "windows-2022"

ArmVirtPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml

@@ -113,7 +113,7 @@ jobs:
     pool:
       vmImage: $(vm_image)
 
-    container: ${{ variables.default_linux_image }}
+    container: ${{ variables.default_linux_container }}
 
     steps:
     - template: ../../../.azurepipelines/templates/platform-build-run-steps.yml

EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml

@@ -87,7 +87,7 @@ jobs:
     pool:
       vmImage: $(vm_image)
 
-    container: ${{ variables.default_linux_image }}
+    container: ${{ variables.default_linux_container }}
 
     steps:
     - template: ../../../.azurepipelines/templates/platform-build-run-steps.yml

OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml

@@ -155,7 +155,7 @@ jobs:
     pool:
       vmImage: $(vm_image)
 
-    container: ${{ variables.default_linux_image }}
+    container: ${{ variables.default_linux_container }}
 
     steps:
     - template: ../../../.azurepipelines/templates/platform-build-run-steps.yml