Swift support for multiple ptd files

[lucylq]

Stack from ghstack (oldest at bottom):

• Export lora weights to sep file #14756
• Use merged data map in module #14767
• Introduce public MergedDataMap #14766
• -> Swift support for multiple ptd files #14754
• JNI support for multiple ptd files #14168
• Runner support for multiple ptd files #14159

Differential Revision: D82075758

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/14754

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✅ You can merge normally! (1 Unrelated Failure)

As of commit 3461a8f with merge base f24351a ():

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

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[facebook-github-bot]

@lucylq has exported this pull request. If you are a Meta employee, you can view the originating Diff in D82075758.

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[lucylq]

@pytorchbot cherry-pick --onto release/1.0 -c examples

[pytorch-bot]

❌ 🤖 pytorchbot command failed:

@pytorchbot cherry-pick: error: argument -c/--classification: invalid choice: 'examples' (choose from 'regression', 'critical', 'fixnewfeature', 'docs', 'release')

usage: @pytorchbot cherry-pick --onto ONTO [--fixes FIXES] -c
                               {regression,critical,fixnewfeature,docs,release}

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