feat(tech/ihp-sg13g2): update user project .def files

This change moves the power rails to TopMetal1, and makes the TopMetal1 layer available for the user designs.

In addition, we now let LibreLane install the PDK instead of having to install it separately.

.github/workflows/test-harden.yaml

@@ -19,7 +19,7 @@ jobs:
       PDK_ROOT: /home/runner/pdk
       PROJECT_DIR: /home/runner/project
       LIBRELANE_VERSION: '2.4.2'
-      LIBRELANE_VERSION_DEV: '3.0.0.dev38'
+      LIBRELANE_VERSION_DEV: '3.0.0.dev44'
 
     steps:
       - name: Check out code
@@ -51,10 +51,6 @@ jobs:
         if: "${{ matrix.pdk == 'ihp-sg13g2' }}"
         run: git clone https://github.com/TinyTapeout/ttihp25b-factory-test ${PROJECT_DIR}
 
-      - name: Install IHP PDK
-        if: "${{ matrix.pdk == 'ihp-sg13g2' }}"
-        run: git clone -b tt2025 --depth 1 https://github.com/TinyTapeout/IHP-Open-PDK ${PDK_ROOT}
-
       - name: Configure tt_tool.py args (IHP)
         if: "${{ matrix.pdk == 'ihp-sg13g2' }}"
         run: echo "TT_TOOL_ARGS=--ihp" >> $GITHUB_ENV