Fix cluster connection failing after execHelm

- The bug was that we were only assigning a reference to the global
  process.env instead of cloning it, so we were accidentally modifying
  the global

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/main/helm/exec.ts

@@ -17,7 +17,7 @@ export async function execHelm(args: string[], options?: BaseEncodingOptions & E
   try {
     const opts = { ...options };
 
-    opts.env ??= process.env;
+    opts.env ??= { ...process.env };
 
     if (!opts.env.HTTPS_PROXY && UserStore.getInstance().httpsProxy) {
       opts.env.HTTPS_PROXY = UserStore.getInstance().httpsProxy;