fix: tighten ProviderLike SDK typings

ProviderLike is too loose because it allows "any" to be ProviderLike.
This tightens the type to only include strings or ethers.Provider
objects.

.changeset/yellow-apples-march.md

+---
+'@eth-optimism/sdk': patch
+---
+
+Tighten type restriction on ProviderLike

packages/sdk/src/interfaces/types.ts

@@ -269,7 +269,7 @@ export type MessageRequestLike =
 /**
  * Stuff that can be coerced into a provider.
  */
-export type ProviderLike = string | Provider | any
+export type ProviderLike = string | Provider
 
 /**
  * Stuff that can be coerced into a signer.