feat: enable application performance profiling (#8442)

# Which Problems Are Solved

To have more insight on the performance, CPU and memory usage of
ZITADEL, we want to enable profiling.

# How the Problems Are Solved

- Allow profiling by configuration.
- Provide Google Cloud Profiler as first implementation

# Additional Changes

None.

# Additional Context

There were possible memory leaks reported:
https://discord.com/channels/927474939156643850/1273210227918897152

Co-authored-by: Silvan <silvan.reusser@gmail.com>

internal/telemetry/profiler/config/config.go

@@ -0,0 +1,30 @@
+package config
+
+import (
+	"github.com/zitadel/zitadel/internal/telemetry/profiler/google"
+	"github.com/zitadel/zitadel/internal/zerrors"
+)
+
+type Config struct {
+	Type   string
+	Config map[string]interface{} `mapstructure:",remain"`
+}
+
+var profiler = map[string]func(map[string]interface{}) error{
+	"google": google.NewProfiler,
+	"none":   NoProfiler,
+	"":       NoProfiler,
+}
+
+func (c *Config) NewProfiler() error {
+	t, ok := profiler[c.Type]
+	if !ok {
+		return zerrors.ThrowInternalf(nil, "PROFI-Dfqsx", "config type %s not supported", c.Type)
+	}
+
+	return t(c.Config)
+}
+
+func NoProfiler(_ map[string]interface{}) error {
+	return nil
+}

internal/telemetry/profiler/google/profiler.go

@@ -0,0 +1,26 @@
+package google
+
+import (
+	"cloud.google.com/go/profiler"
+
+	"github.com/zitadel/zitadel/cmd/build"
+)
+
+type Config struct {
+	ProjectID string
+}
+
+func NewProfiler(rawConfig map[string]interface{}) (err error) {
+	c := new(Config)
+	c.ProjectID, _ = rawConfig["projectid"].(string)
+	return c.NewProfiler()
+}
+
+func (c *Config) NewProfiler() (err error) {
+	cfg := profiler.Config{
+		Service:        "zitadel",
+		ServiceVersion: build.Version(),
+		ProjectID:      c.ProjectID,
+	}
+	return profiler.Start(cfg)
+}