chore: modularize .tool-versions (#10919)

Not all tools are needed for all parts of the codebase. In order to avoid installing all tools, we create nested `.tool-versions` files that list the specific dev-tools needed for a certain part of the product.

.github/actions/setup-android/action.yml

@@ -7,6 +7,10 @@ inputs:
 runs:
   using: "composite"
   steps:
+    - uses: marocchino/tool-versions-action@18a164fa2b0db1cc1edf7305fcb17ace36d1c306 # v1.2.0
+      with:
+        path: kotlin/android/.tool-versions
+
     - uses: ./.github/actions/setup-rust
       with:
         targets: armv7-linux-androideabi aarch64-linux-android x86_64-linux-android i686-linux-android

.github/actions/setup-elixir/action.yml

@@ -17,6 +17,8 @@ runs:
     - name: Tool Versions
       id: versions
       uses: marocchino/tool-versions-action@18a164fa2b0db1cc1edf7305fcb17ace36d1c306 # v1.2.0
+      with:
+        path: elixir/.tool-versions
     - uses: erlef/setup-beam@e6d7c94229049569db56a7ad5a540c051a010af9 # v1.20.4
       id: setup-beam
       with:

.github/workflows/_kotlin.yml

@@ -67,7 +67,6 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           fetch-tags: true # Otherwise we cannot embed the correct version into the build.
-      - uses: marocchino/tool-versions-action@18a164fa2b0db1cc1edf7305fcb17ace36d1c306 # v1.2.0
       - uses: ./.github/actions/setup-android
         with:
           sccache_azure_connection_string: ${{ secrets.SCCACHE_AZURE_CONNECTION_STRING }}