[CI] Decommission mi308/mi325 runners (#24782)

We no longer have access.

---------

Signed-off-by: Jelle Schühmacher <schuehmacher@roofline.ai>
diff --git a/.github/workflows/pkgci.yml b/.github/workflows/pkgci.yml
index 0fd37ce..b1533b4 100644
--- a/.github/workflows/pkgci.yml
+++ b/.github/workflows/pkgci.yml
@@ -46,12 +46,6 @@
   # Jobs that run unit tests on special hardware platforms or accelerators
   #############################################################################
 
-  test_amd_mi325:
-    name: Test AMD MI325
-    needs: [setup, build_packages]
-    if: contains(fromJson(needs.setup.outputs.enabled-jobs), 'test_amd_mi325')
-    uses: ./.github/workflows/pkgci_test_amd_mi325.yml
-
   test_amd_w7900:
     name: Test AMD W7900
     needs: [setup, build_packages]
@@ -132,7 +126,6 @@
       - setup
       - build_packages
       - unit_test
-      - test_amd_mi325
       - test_amd_w7900
       - test_amd_r9700
       # - test_nvidia_t4
diff --git a/.github/workflows/pkgci_test_amd_mi325.yml b/.github/workflows/pkgci_test_amd_mi325.yml
deleted file mode 100644
index df0e004..0000000
--- a/.github/workflows/pkgci_test_amd_mi325.yml
+++ /dev/null
@@ -1,72 +0,0 @@
-# Copyright 2024 The IREE Authors
-#
-# Licensed under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-name: PkgCI Test AMD MI325
-on:
-  workflow_call:
-    inputs:
-      artifact_run_id:
-        type: string
-        default: ""
-  workflow_dispatch:
-    inputs:
-      artifact_run_id:
-        type: string
-        default: ""
-
-jobs:
-  test_mi325:
-    runs-on: linux-mi325-1gpu-ossci-iree-org
-    env:
-      PACKAGE_DOWNLOAD_DIR: ${{ github.workspace }}/.packages
-      BUILD_DIR: build-tests
-      VENV_DIR: ${{ github.workspace }}/.venv
-      GH_TOKEN: ${{ github.token }}
-      IREE_CPU_DISABLE: 1
-      IREE_VULKAN_DISABLE: 1
-      IREE_CUDA_ENABLE: 0
-      IREE_HIP_ENABLE: 1
-      IREE_ROCM_TEST_TARGET_CHIP: "gfx942"
-    steps:
-      - name: Run rocminfo
-        run: rocminfo
-      - name: Check out repository
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: false
-      - name: Check out runtime submodules
-        run: ./build_tools/scripts/git/update_runtime_submodules.sh
-      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
-        with:
-          # Must match the subset of versions built in pkgci_build_packages.
-          python-version: "3.11"
-      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
-        if: ${{ inputs.artifact_run_id == '' }}
-        with:
-          name: linux_x86_64_release_packages
-          path: ${{ env.PACKAGE_DOWNLOAD_DIR }}
-      - name: Setup base venv
-        run: |
-          ./build_tools/pkgci/setup_venv.py ${VENV_DIR} \
-            --artifact-path=${PACKAGE_DOWNLOAD_DIR} \
-            --fetch-gh-workflow=${{ inputs.artifact_run_id }}
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Build tests
-        run: ./build_tools/pkgci/build_tests_using_package.sh ${VENV_DIR}/bin
-      - name: Run GPU tests
-        env:
-          CTEST_PARALLEL_LEVEL: 2
-          IREE_CTEST_LABEL_REGEX: ^requires-gpu|^driver=hip$
-          IREE_AMD_CDNA3_TESTS_DISABLE: 0
-          IREE_AMD_RDNA3_TESTS_DISABLE: 1
-          IREE_NVIDIA_GPU_TESTS_DISABLE: 0
-          IREE_NVIDIA_SM80_TESTS_DISABLE: 1
-          IREE_MULTI_DEVICE_TESTS_DISABLE: 0
-          # Enable hip logging on errors.
-          AMD_LOG_LEVEL: 1
-        run: ./build_tools/cmake/ctest_all.sh ${BUILD_DIR}
diff --git a/.github/workflows/pkgci_test_sharktank.yml b/.github/workflows/pkgci_test_sharktank.yml
index e0473a3..9990236 100644
--- a/.github/workflows/pkgci_test_sharktank.yml
+++ b/.github/workflows/pkgci_test_sharktank.yml
@@ -39,15 +39,6 @@
               - Linux
               - X64
 
-          # AMD GPU
-          - name: amdgpu_rocm_mi308_gfx942
-            rocm-chip: gfx942
-            backend: rocm
-            iree_test_files: /home/esaimana/iree_tests_cache
-            sku: mi308
-            target: target_hip
-            runs-on: nodai-amdgpu-mi308-x86-64
-
     env:
       VENV_DIR: ${{ github.workspace }}/venv
       PACKAGE_DOWNLOAD_DIR: ${{ github.workspace }}/.packages