github: remove windows and update linux

- update ubuntu and go versions
- don't specify clang version
- remove windows

Author: djoreilly

.github/workflows/linux.yml

@@ -7,7 +7,7 @@ jobs:
     name: Test
     # We used to build on ubuntu-18.04 but that is now deprecated by
     # GitHub. Earlier distributions will have to use the musl build.
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
 
     - name: Check out code and submodules into the Go module directory
@@ -17,15 +17,15 @@ jobs:
 
     - uses: actions/setup-go@v2
       with:
-        go-version: '^1.19'
+        go-version: '^1.26'
 
     - run: go version
 
     - name: Get dependencies
       run: |
         go get -v -t -d ./...
         sudo apt-get update
-        sudo apt-get install libsystemd-dev clang-12 llvm libelf-dev git make libzstd-dev
+        sudo apt-get install libsystemd-dev clang llvm libelf-dev git make libzstd-dev
 
     - name: Build GUI-less binary
       run: |