Bump version to 0.27.0.dev0

[b-chu]

What does this PR do?

Bumps version to 0.27.0.dev0 and removes deprecated fsdp interface

What issue(s) does this change relate to?

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[mvpatel2000]

@dakinggg plz confirm deprecations are OK on foundry side

Edit: we should check if we want to release now

[b-chu]

Decided to release on normal cadence