GH: cache gopls and language server deps. Remove terraform-ls intallation

terraform-ls is installed on the fly

.github/workflows/pytest.yml

@@ -32,7 +32,16 @@ jobs:
       # Add Go bin directory to PATH for this workflow
       # GITHUB_PATH is a special file that GitHub Actions uses to modify PATH
       # Writing to this file adds the directory to the PATH for subsequent steps
+      - name: Cache Go binaries
+        id: cache-go-binaries
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/go/bin
+            ~/.cache/go-build
+          key: go-binaries-${{ runner.os }}-${{ hashFiles('**/go.sum') }}-gopls-latest
       - name: Install gopls
+        if: steps.cache-go-binaries.outputs.cache-hit != 'true'
         shell: bash
         run: go install golang.org/x/tools/gopls@latest
       - name: Set up Elixir
@@ -56,35 +65,6 @@ jobs:
         with:
           terraform_version: "1.5.0"
           terraform_wrapper: false
-      - name: Install terraform-ls (Windows)
-        if: runner.os == 'Windows'
-        shell: pwsh
-        run: |
-          Write-Host "Installing terraform-ls manually for Windows"
-          $ver = '0.32.7'
-          $zip = "terraform-ls_${ver}_windows_amd64.zip"
-          Invoke-WebRequest -Uri "https://releases.hashicorp.com/terraform-ls/$ver/$zip" -OutFile $zip
-          
-          $dest = "$env:USERPROFILE\terraform-ls"
-          New-Item -ItemType Directory -Force -Path $dest | Out-Null
-          Expand-Archive $zip -DestinationPath $dest -Force
-          
-          Write-Host "terraform-ls installed to: $dest"
-          echo "$dest" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-      - name: Install terraform-ls (Linux/macOS)
-        if: runner.os != 'Windows'
-        shell: bash
-        run: |
-          ver=0.32.7
-          os=$(uname | tr '[:upper:]' '[:lower:]')
-          echo "Installing terraform-ls ${ver} for ${os}"
-          curl -sSL -o tfls.zip \
-            "https://releases.hashicorp.com/terraform-ls/${ver}/terraform-ls_${ver}_${os}_amd64.zip"
-          mkdir -p "$HOME/bin"
-          unzip -q tfls.zip -d "$HOME/bin"
-          chmod +x "$HOME/bin/terraform-ls"
-          echo "$HOME/bin" >> "$GITHUB_PATH"
-          echo "terraform-ls installed to $HOME/bin"
       - name: Install uv
         shell: bash
         run: curl -LsSf https://astral.sh/uv/install.sh | sh
@@ -94,6 +74,12 @@ jobs:
         with:
           path: .venv
           key: uv-venv-${{ runner.os }}-${{ matrix.python-version }}-${{ hashFiles('uv.lock') }}
+      - name: Cache language servers
+        id: cache-language-servers
+        uses: actions/cache@v3
+        with:
+          path: src/solidlsp/language_servers/static
+          key: language-servers-${{ runner.os }}-${{ hashFiles('src/solidlsp/language_servers/static/**') }}
       - name: Create virtual environment
         shell: bash
         run: |