Remote extension auto-install/update logic is broken and might block entire connection

[legomushroom]

Due to https://github.com/cli/cli/issues/6675 and since we auto-installing/updating gh net extension inside a Codespace automatically (to act as a remove agent), some of the connection attempt may fail due to the install/update attempt failure. Since the fix on the GH CLI side is not something we can expect soon, we might need to implement the custom install/update logic on our side meanwhile instead.