[Bugfix] Always call `bind_to_run` on seq items

[nbardy]

This fixes the case of reusing image objects in a seq.

images = [wandb.Image("pic.jpeg")]

wandb.log({"image": images})
wandb.log({"image": images})

[coveralls]

Pull Request Test Coverage Report for Build 8cddeac4-4225-40d7-8972-1f60a50ca0fa

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.01%) to 60.43%

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Files with Coverage Reduction	New Missed Lines	%
wandb/lib/server.py	2	80.0%
<!--	Total:	2		-->

Totals
Change from base Build 3c2725da-3aac-4d97-9370-7f4067e9deb7:	-0.01%
Covered Lines:	12355
Relevant Lines:	20445

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💛 - Coveralls