[client] Move some sys info to static place (#4446)

This PR refactors the system information collection code by moving static system information gathering to a dedicated location and separating platform-specific implementations. The primary goal is to improve code organization and maintainability by centralizing static info collection logic.

Key changes:
- Centralized static info collection into dedicated files with platform-specific implementations
- Moved `StaticInfo` struct definition to the main static_info.go file
- Added async initialization function `UpdateStaticInfoAsync()` across all platforms

client/system/info.go

@@ -95,14 +95,6 @@ func (i *Info) SetFlags(
 	i.LazyConnectionEnabled = lazyConnectionEnabled
 }
 
-// StaticInfo is an object that contains machine information that does not change
-type StaticInfo struct {
-	SystemSerialNumber string
-	SystemProductName  string
-	SystemManufacturer string
-	Environment        Environment
-}
-
 // extractUserAgent extracts Netbird's agent (client) name and version from the outgoing context
 func extractUserAgent(ctx context.Context) string {
 	md, hasMeta := metadata.FromOutgoingContext(ctx)
@@ -195,10 +187,3 @@ func GetInfoWithChecks(ctx context.Context, checks []*proto.Checks) (*Info, erro
 
 	return info, nil
 }
-
-// UpdateStaticInfo asynchronously updates static system and platform information
-func UpdateStaticInfo() {
-	go func() {
-		_ = updateStaticInfo()
-	}()
-}