[Bug] - Self-update updates when already current on a fresh install.

[rrehbein]

Describe the bug
Self-update will update the agent when the agent is already the same version as latest version.

To Reproduce
Steps to reproduce the behavior:

1. Enable SSM self-update in AWS Console.
2. Start a new AL2023 instance with user-data

#!/bin/sh
yum install -y https://s3.us-east-1.amazonaws.com/ec2-downloads-windows/SSMAgent/latest/linux_amd64/amazon-ssm-agent.rpm
systemctl enable amazon-ssm-agent.service --now

3. Check ssm logs around the term updateSsmAgent

Expected behavior

Update-agent to skip installing a 'newer' version when the current version and the latest version are the same version.

Actual

Snippets of amazon-ssm-agent.log

2024-10-09 08:26:22.3216 INFO [ssm-agent-worker] [StartupProcessor] Write to serial port:
    Amazon SSM Agent v3.3.859.0 is running
... snip ...
2024-10-09 08:26:22.3420 INFO [ssm-agent-worker] ssm-agent-worker - v3.3.859.0
... snip ...
2024-10-09 08:26:32.3227 INFO [ssm-document-worker] [b0382a5d-000d-46d4-abf9-64fd78148ef4]
    [DataBackend] [pluginName=aws:updateSsmAgent] UpdateS3Util Latest updater version is 3.3.859.0
... snip ...
2024-10-09 08:26:32.5475 INFO [ssm-document-worker] [b0382a5d-000d-46d4-abf9-64fd78148ef4]
    [DataBackend] [pluginName=aws:updateSsmAgent] Start Installation

Observed this while trying to workaround the issues in #397

[rrehbein]

Sorry, wrong project.