[Thanatos9404]

Issue #, if available:

Fixes #4751

Description of changes:

The Price List usage type shortens Amazon MQ sizes from 2xlarge up (mq.m7g.2xl), and get_mq_pricing() only mapped mq.m5.2xl and mq.m5.4xl back to the full names. So the enum listed mq.m7g.2xl through mq.m7g.16xl (36 regions) and mq.m7i.2xl/4xl (ap-east-2, ap-southeast-6), and E3670 rejected mq.m7g.2xlarge and the other names the Amazon MQ API and the docs use.

• scripts/update_specs_from_pricing.py: replace the two-entry remap with get_mq_instance_type(), which expands any <N>xl size to <N>xlarge. The m5 names come out the same as before.
• aws_amazonmq_broker/instancetype_enum.json: the same mapping applied to the committed file. I don't have Pricing API access, so this is not a regeneration: I ran the script's own get_mq_instance_type() over every region list and wrote the file back in the format write_output() uses. Only the xl names change (184 lines renamed, nothing added or removed), and every size keeps its place in the sorted lists.

mq.m4.large and mq.t2.micro, which the issue also mentions, are left alone here: the Price List still lists them, so removing them by hand would be undone by the next pricing run.

Tests: a new parametrized test for BrokerInstanceTypeEnum (all five m7g sizes in us-east-1, the two m7i sizes in ap-east-2 and ap-southeast-6, and mq.m7g.2xl, an unknown size and an m7i size outside those regions as failures), and a test in test_update_specs_from_pricing.py that runs get_mq_pricing() on mocked Price List products. On main 9 of the new cases fail; with this change they pass, the full test suite passes (Python 3.13), and pre-commit run on the changed files passes. No snapshot under test/fixtures/results is affected.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.67%. Comparing base (dff589f) to head (7ec6727).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4760   +/-   ##
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  Coverage   94.67%   94.67%           
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  Files         439      439           
  Lines       15969    15969           
  Branches     3095     3095           
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  Hits        15118    15118           
  Misses        468      468           
  Partials      383      383           

Flag	Coverage Δ
unittests	94.67% <ø> (ø)

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