agent: add separate glibc build with NVML support (#1618)

purego requires dynamic linking, so split the agent builds:
- Default: static binary without NVML (works on musl/alpine)
- Glibc: dynamic binary with NVML support via purego

Changes:
- Add glibc build tag to conditionally include NVML code
- Add beszel-agent-linux-amd64-glibc build/archive in goreleaser
- Update ghupdate to use glibc binary on glibc systems
- Switch nvidia dockerfile to golang:bookworm with -tags glibc

agent/gpu.go

@@ -5,6 +5,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"log/slog"
 	"maps"
 	"os/exec"
 	"regexp"
@@ -14,8 +15,6 @@ import (
 	"time"
 
 	"github.com/henrygd/beszel/internal/entities/system"
-
-	"log/slog"
 )
 
 const (

agent/gpu_nvml.go

@@ -1,4 +1,4 @@
-//go:build (linux || windows) && amd64
+//go:build amd64 && (windows || (linux && glibc))
 
 package agent
 

agent/gpu_nvml_linux.go

@@ -1,4 +1,4 @@
-//go:build linux && amd64
+//go:build glibc && linux && amd64
 
 package agent
 

agent/gpu_nvml_unsupported.go

@@ -1,4 +1,4 @@
-//go:build (!linux && !windows) || !amd64
+//go:build (!linux && !windows) || !amd64 || (linux && !glibc)
 
 package agent
 

agent/systemd_nonlinux_test.go

@@ -19,11 +19,11 @@ func TestSystemdManagerGetServiceStats(t *testing.T) {
 	assert.NoError(t, err)
 
 	// Test with refresh = true
-	result := manager.getServiceStats(true)
+	result := manager.getServiceStats("any-service", true)
 	assert.Nil(t, result)
 
 	// Test with refresh = false
-	result = manager.getServiceStats(false)
+	result = manager.getServiceStats("any-service", false)
 	assert.Nil(t, result)
 }