all: Implement action RPC support in all mux servers

[austinvalle]

Related Issue

Related: hashicorp/terraform-plugin-go#534

Description

This PR adds action support for all of the mux server implementations and translations.

This PR also makes a specific changes to some of the list resource RPCs to ensure we don't need to re-release terraform-plugin-mux once we remove the temporary interface. After the changes in this PR, the only references to the temporary interfaces (both actions and list resource) are in the test packages, so removing the interfaces will only break our CI and not actual provider codebases 👍🏻

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I didn't add any changelogs to this PR since there aren't any ways to use this protocol ATM, we can come back later and add them 👍🏻

Rollback Plan

• If a change needs to be reverted, we will roll out an update to the code within 7 days.

Changes to Security Controls

No

[austinvalle]

@SBGoods Updated the go.mod and sum to point to terraform-plugin-go@main now that hashicorp/terraform-plugin-go#534 is merged