ec2_launch_template: Add option to define custom throughput

[KamilBlaz]

SUMMARY

Fixes #1944 Add throughput option to ec2_launch_template module in section block_device_mappings

ISSUE TYPE

• Bugfix Pull Request
• Docs Pull Request
• Feature Pull Request
• New Module Pull Request

COMPONENT NAME

ADDITIONAL INFORMATION

[softwarefactory-project-zuul[bot]]

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[markuman]

@KamilBlaz thank you very much for your contribution.
Your PR needs at least a changelog fragment.
Furthermore, can you please append the integration test in tests/integration/targets/ec2_launch_template/?
otherwise looks good to me.

[abikouo]

@KamilBlaz Thanks for your contribution. Since the PR has not been updated and we are preparing the migration of this module, I have integrate the following changes into the PR #2164