fix: replace set_track_meta with F.interpolate in RandSimulateLowResolution (#8409)

[chhayankjain]

Fixes #8409

Description

RandSimulateLowResolution internally performs a downsample → upsample cycle using two
Resize transforms. To prevent these from being recorded in the invertible transform
stack, the previous implementation temporarily toggled the global set_track_meta(False)
flag and restored it afterward.

This is not thread-safe: in multi-threaded data loading (e.g. ThreadDataLoader), another
thread calling get_track_meta() between the toggle and the restore would silently receive
the wrong value, causing incorrect metadata tracking behaviour.

Fix: replace the Resize transforms with direct torch.nn.functional.interpolate calls on
a plain tensor obtained via convert_to_tensor(img, track_meta=False). This avoids any
global state mutation entirely. Output dtype (float32) and metadata-copy behaviour are
preserved from the original implementation. set_track_meta is also removed from the import
since it is no longer used anywhere in the file.

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

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[chhayankjain]

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