ec2_instance: Add support to run spot instances

[tgadiev]

Summary

It appears that this module lacks a useful ability, as mentioned in the documentation. The recommendation is to use the ec2_spot_instance module. However, the ec2_spot_instance module does not support setting the instance metadata option, which is highly needed in some cases. As a result, there is a significant gap in functionality. The options available are to run spot instances using the ec2_spot_instance module without an adjusted metadata option, or to run instances using the ec2_instance module that has this feature, but this way, you cannot start spot instances. According to [boto documentation], adding spot support is relatively simple; it just requires adding the InstanceMarketOptions properties to the build_top_level_options function.

Issue Type

Feature Idea

Component Name

ec2_instance

Additional Information

I would like to have it like this:

- name: start spot instance with metadata options
  amazon.aws.ec2_instance:
    name: "spot-metadataoptions-instance"
    vpc_subnet_id: subnet-5calable
    instance_type: t3.small
    image_id: ami-123456
    tags:
      Environment: Testing
    metadata_options:
      http_endpoint: enabled
      http_tokens: optional
    spot_options:
      spot_instance_type: 'one-time'
      max_price: '0.055' 

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