Cherry Pick bug fixes from v5.5.0-beta.2 (#5429)

src/main/helm/exec.ts

@@ -23,7 +23,7 @@ export async function execHelm(args: string[], { encoding, ...rest }: BaseEncodi
   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;

src/main/kubectl/kubectl.ts

@@ -156,7 +156,7 @@ export class Kubectl {
       try {
         const args = [
           "version",
-          "--client", "true",
+          "--client",
           "--output", "json",
         ];
         const { stdout } = await promiseExecFile(path, args);