fix(ec2): unintuitive icon layout #6224

## Problem
EC2 icons are in an awkward order with the link to launch in-between the
two connect options.

## Solution
https://stackoverflow.com/questions/47613141/how-to-specify-the-order-of-icons-in-an-explorer-view-in-a-vscode-extension.

Also update descriptions to fit UX guidelines.

Author: Hweinstock

packages/core/package.nls.json

@@ -142,8 +142,8 @@
     "AWS.command.refreshAwsExplorer": "Refresh Explorer",
     "AWS.command.refreshCdkExplorer": "Refresh CDK Explorer",
     "AWS.command.cdk.help": "View CDK Documentation",
-    "AWS.command.ec2.openTerminal": "Open terminal to EC2 instance...",
-    "AWS.command.ec2.openRemoteConnection": "Connect to EC2 instance in New Window...",
+    "AWS.command.ec2.openTerminal": "Open Terminal to EC2 Instance...",
+    "AWS.command.ec2.openRemoteConnection": "Connect VS Code to EC2 Instance...",
     "AWS.command.ec2.startInstance": "Start EC2 Instance",
     "AWS.command.ec2.linkToLaunch": "Launch EC2 Instance",
     "AWS.command.ec2.stopInstance": "Stop EC2 Instance",

packages/toolkit/package.json

@@ -1462,12 +1462,12 @@
                 },
                 {
                     "command": "aws.ec2.linkToLaunch",
-                    "group": "0@1",
+                    "group": "0@0",
                     "when": "viewItem =~ /^(awsEc2ParentNode)$/ && config.aws.experiments.ec2RemoteConnect"
                 },
                 {
                     "command": "aws.ec2.linkToLaunch",
-                    "group": "inline@1",
+                    "group": "inline@0",
                     "when": "viewItem =~ /^(awsEc2ParentNode)$/ && config.aws.experiments.ec2RemoteConnect"
                 },
                 {