[Varshith-Kali]

Issue #, if available: Fixes #4826

Description of changes:

• Problem: E1152 reported a false positive on AWS::EC2::Instance ImageId when the value is a resolve:ssm:<parameter> reference. EC2 resolves the Systems Manager parameter at launch for a plain instance, and the AWS CDK emits exactly this form on AWS::EC2::Instance (MachineImage.resolveSsmParameterAtLaunch). The issue's repro template deploys to CREATE_COMPLETE.
• Root cause: The resolve:ssm: exception added for E1152 and dynamic parameters #3329 in src/cfnlint/rules/formats/ImageId.py was keyed to a single cfn path: Resources/AWS::EC2::LaunchTemplate/Properties/LaunchTemplateData/ImageId. The same SSM-at-launch behavior on AWS::EC2::Instance/Properties/ImageId was not covered, so the value fell through to the AMI id pattern check.
• Fix: Replaced the single-path equality check with a tuple of accepted paths covering both the launch template form and Resources/AWS::EC2::Instance/Properties/ImageId. Any other resolve:ssm: value (or any other location) is still validated against the AMI pattern as before.

Test evidence:

• New regression test in test/unit/rules/formats/test_image_id.py: resolve:ssm:... at Resources/AWS::EC2::Instance/Properties/ImageId passes. Verified it fails on the unpatched code (red) and passes with the fix (green).
• End-to-end check via cfnlint.api.lint_file on the issue's repro template: pre-fix, E1152 'resolve:ssm:...' is not a 'AWS::EC2::Image.Id' ...; post-fix, zero matches. Launch-template template still clean (regression), and an invalid ImageId: ami-abc still raises E1152.
• test/unit/rules/formats/: 90 passed. test/unit/rules/: 2025 passed. ruff check and ruff format --check clean on both changed files.

[Varshith-Kali]

Hi, the Test PR run on this PR is parked waiting for a maintainer approval (first-time-contributor gate). Could someone approve it when you get a chance? Thanks.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.68%. Comparing base (e8f395b) to head (b67f3fd).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4828   +/-   ##
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  Coverage   94.68%   94.68%           
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  Files         439      439           
  Lines       15973    15974    +1     
  Branches     3097     3097           
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+ Hits        15124    15125    +1     
  Misses        467      467           
  Partials      382      382           

Flag	Coverage Δ
unittests	94.67% <100.00%> (+<0.01%)	⬆️

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