Modify pip handling to use platform tag for iOS. (#2101) #5148

Job	Run time
Package Briefcase / Create Python Package	14s
Pre-commit checks / Pre-commit Checks	37s
Package Automation / Create Python Package	24s
Check towncrier / Towncrier Checks	22s
Unit tests (macos-13, 3.9)	45s
Unit tests (macos-13, 3.13)	42s
Unit tests (macos-latest, 3.9)	34s
Unit tests (macos-latest, 3.13)	47s
Unit tests (windows-latest, 3.9)	37s
Unit tests (windows-latest, 3.13)	28s
Unit tests (ubuntu-latest, 3.9)	46s
Unit tests (ubuntu-latest, 3.13)	43s
Unit tests (ubuntu-latest, 3.10)	46s
Unit tests (ubuntu-latest, 3.11)	44s
Unit tests (ubuntu-latest, 3.12)	46s
Project coverage	1s
Build app	1s
Verify project	1s
	9m 18s

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