requirements: update craft-parts to 1.15.3

[cmatsuoka]

Craft-parts 1.15.3 fixes ignored file patterns when processing local sources.

Signed-off-by: Claudio Matsuoka claudio.matsuoka@canonical.com

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• Have you signed the CLA?
• Have you successfully run make lint?
• Have you successfully run pytest tests/unit?

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[codecov-commenter]

Codecov Report

Merging #4030 (99d4b85) into hotfix/7.2 (06ca484) will increase coverage by 0.32%.
The diff coverage is 70.00%.

❗ Current head 99d4b85 differs from pull request most recent head ea509bb. Consider uploading reports for the commit ea509bb to get more accurate results

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@@              Coverage Diff               @@
##           hotfix/7.2    #4030      +/-   ##
==============================================
+ Coverage       91.04%   91.37%   +0.32%     
==============================================
  Files              56       77      +21     
  Lines            4078     5078    +1000     
==============================================
+ Hits             3713     4640     +927     
- Misses            365      438      +73     

Impacted Files	Coverage Δ
snapcraft/linters/library_linter.py	87.23% <70.00%> (-4.66%)	⬇️
snapcraft/projects.py	96.53% <0.00%> (ø)
snapcraft/linters/__init__.py	100.00% <0.00%> (ø)
snapcraft/repo/errors.py	88.88% <0.00%> (ø)
snapcraft/errors.py	91.17% <0.00%> (ø)
snapcraft/repo/apt_ppa.py	90.90% <0.00%> (ø)
snapcraft/__init__.py	72.72% <0.00%> (ø)
snapcraft/ua_manager.py	96.38% <0.00%> (ø)
snapcraft/repo/apt_sources_manager.py	94.73% <0.00%> (ø)
snapcraft/utils.py	84.39% <0.00%> (ø)
... and 12 more

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[mr-cal]

I think hotfix/7.2 is missing #4015 and #4013, which is causing the 2 core18 spread test failures.