Regression in 1.3.7 : amazon-ebs builder fails to launch a source AWS instance

#### Overview of the Issue

The command `packer build .` hangs for approximately 3 minutes ±10 seconds right after logging `Creating temporary security group for this instance: packer_XXXXX`. The subsequent expected log `==> phonetix.amazon-ebs.phonetix: Launching a source AWS instance...` never shows up. Then, the following is logged:

```
==> my-ami.amazon-ebs.phonetix: Deleting temporary security group...
==> my-ami.amazon-ebs.phonetix: Deleting temporary keypair...
Build 'my-ami.amazon-ebs.phonetix' errored after 3 minutes 2 seconds: Couldn't find specified instance profile: RequestError: send request failed
caused by: Post "https://iam.amazonaws.com/": net/http: TLS handshake timeout
```

#### Reproduction Steps

1. Install the 1.3.6 release
2. Run `packer init .` and `packer build .`
3. Wait until successful completion
4. Install the 1.3.7 release
5. Run `packer init .` and `packer build .`
6. Wait until timeout

### Plugin and Packer version

`packer version` : Packer v1.13.1
```
$ packer version
Packer v1.13.1

$ packer plugins installed
/root/.config/packer/plugins/github.com/hashicorp/amazon/packer-plugin-amazon_v1.3.6_x5.0_linux_arm64
/root/.config/packer/plugins/github.com/hashicorp/amazon/packer-plugin-amazon_v1.3.7_x5.0_linux_arm64
/root/.config/packer/plugins/github.com/hashicorp/ansible/packer-plugin-ansible_v1.1.3_x5.0_linux_arm64
```

### Simplified Packer Buildfile

```
packer {
required_plugins {
amazon = {
version = "= 1.3.7"
source = "github.com/hashicorp/amazon"
}
}
}

source "amazon-ebs" "test" {
ami_name = "test"
instance_type = "t4g.small"
region = "ca-central-1"
source_ami_filter {
filters = {
virtualization-type = "hvm"
name = "ubuntu/images/hvm-ssd-gp3/ubuntu-noble-24.04-arm64-server-*"
root-device-type = "ebs"
}
owners = ["099720109477"]
most_recent = true
}
ssh_username = "ubuntu"
ssh_interface = "session_manager"
communicator = "ssh"
iam_instance_profile = "my-profile"
force_deregister = true
force_delete_snapshot = true
launch_block_device_mappings {
device_name = "/dev/sda1"
volume_size = 64
encrypted = false
delete_on_termination = true
}
vpc_filter {
filters = {
"isDefault" : "true",
}
}
subnet_filter {
most_free = true
random = false
}
}

build {
name = "test"
sources = [
"source.amazon-ebs.test"
]
provisioner "shell" {
inline = [
"sudo cloud-init status --wait"
]
}
}
```

### Operating system and Environment details

Docker is installed on a virtual machine running Ubuntu Server 24.04 LTS aarch64 on a Apple arm64 machine running macOS 15.4.1. The corporate network does not have a proxy.
Recently had a similar timeout issue with Docker itself that is tracked here: https://github.com/moby/moby/issues/50035#issuecomment-3005928592

### Log Fragments and crash.log files

```
2025/06/25 16:07:45 packer-plugin-amazon_v1.3.7_x5.0_linux_arm64 plugin: 2025/06/25 16:07:45 [INFO] Finding AZ and VpcId for the given subnet 'subnet-XXXX'
2025/06/25 16:07:45 packer-plugin-amazon_v1.3.7_x5.0_linux_arm64 plugin: 2025/06/25 16:07:45 [INFO] AvailabilityZone found: 'ca-central-1b'
==> test.amazon-ebs.test: Creating temporary keypair: packer_XXXX
==> test.amazon-ebs.test: Creating temporary security group for this instance: packer_XXXX
2025/06/25 16:07:46 packer-plugin-amazon_v1.3.7_x5.0_linux_arm64 plugin: 2025/06/25 16:07:46 [DEBUG] Waiting for temporary security group: sg-XXXX
2025/06/25 16:07:46 packer-plugin-amazon_v1.3.7_x5.0_linux_arm64 plugin: 2025/06/25 16:07:46 [DEBUG] Found security group sg-XXXX
2025/06/25 16:10:30 packer-plugin-amazon_v1.3.7_x5.0_linux_arm64 plugin: 2025/06/25 16:10:30 [DEBUG] Couldn't find specified instance profile: RequestError: send request failed
2025/06/25 16:10:30 packer-plugin-amazon_v1.3.7_x5.0_linux_arm64 plugin: caused by: Post "https://iam.amazonaws.com/": net/http: TLS handshake timeout
==> test.amazon-ebs.test: Deleting temporary security group...
==> test.amazon-ebs.test: Deleting temporary keypair...
```