Add `convert_module` to FSDP #9482

Job	Run time
fabric-cpu (macOS-14, lightning, 3.10, 2.1)	9m 1s
fabric-cpu (ubuntu-20.04, lightning, 3.10, 2.1)	6m 26s
fabric-cpu (windows-2022, lightning, 3.10, 2.1)	8m 28s
fabric-cpu (macOS-14, lightning, 3.11, 2.2)	8m 53s
fabric-cpu (ubuntu-20.04, lightning, 3.11, 2.2)	6m 10s
fabric-cpu (windows-2022, lightning, 3.11, 2.2)	8m 8s
fabric-cpu (macOS-14, lightning, 3.11, 2.3)	9m 36s
fabric-cpu (ubuntu-20.04, lightning, 3.11, 2.3)	6m 16s
fabric-cpu (windows-2022, lightning, 3.11, 2.3)	9m 20s
fabric-cpu (macOS-14, lightning, 3.12, 2.4)	8m 59s
fabric-cpu (ubuntu-20.04, lightning, 3.12, 2.4)	8m 35s
fabric-cpu (windows-2022, lightning, 3.12, 2.4)	8m 18s
fabric-cpu (macOS-12, fabric, 3.10, 2.1)	9m 56s
fabric-cpu (ubuntu-22.04, fabric, 3.10, 2.1)	5m 43s
fabric-cpu (windows-2022, fabric, 3.10, 2.1)	7m 22s
fabric-cpu (macOS-13, lightning, 3.9, 2.1, oldest)	10m 44s
fabric-cpu (ubuntu-20.04, lightning, 3.9, 2.1, oldest)	4m 51s
fabric-cpu (windows-2022, lightning, 3.9, 2.1, oldest)	6m 2s
fabric-cpu (macOS-14, fabric, 3.9, 2.1)	8m 44s
fabric-cpu (ubuntu-20.04, fabric, 3.9, 2.1)	5m 34s
fabric-cpu (windows-2022, fabric, 3.9, 2.1)	7m 9s
	2h 44m 15s

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