fix: fix overly broad tuple type check

[deekerno]

Description

While debugging an issue for a grantee, I noticed that is_tuple_type() was causing the unit type (()) to not be included as part of the hash table keeps track of types in a contract ABI. After fixing that, I noticed that we needed to add a unit type check to is_nondecodable_type() so that we do not create a decoder for it.

Testing steps

On develop:

1. cargo build -p forc-index
2. Create a new indexer.
3. Change the fuel-indexer-utils dependency to use the local package (make sure you're still on develop).
4. Save the following reproduction ABI and adjust the indexer manifest accordingly:

{
  "types": [
    {
      "typeId": 0,
      "type": "()",
      "components": [],
      "typeParameters": null
    },
    {
      "typeId": 1,
      "type": "enum ExampleEnum",
      "components": [
        {
          "name": "A",
          "type": 0,
          "typeArguments": null
        }
      ],
      "typeParameters": null
    }
  ],
  "functions": [
    {
      "inputs": [
        {
          "name": "e",
          "type": 1,
          "typeArguments": null
        }
      ],
      "name": "example_fn",
      "output": {
        "name": "",
        "type": 0,
        "typeArguments": null
      },
      "attributes": null
    }
  ],
  "loggedTypes": [],
  "messagesTypes": [],
  "configurables": []
}

5. cargo build

The build should fail with the error:
message: Could not derive TypeApplication param types.: InvalidData("type id 0 not found in type lookup").

On this branch:

1. Switch to this branch and ensure that you have the changes from this PR present locally.
2. Run cargo build again.

The indexer should successfully build.

Changelog

• 2c87dd4 - fix type check
• 1e1900e - upgrade test contracts to Sway v0.45.0

Notes

The ABI included above was generated for the following Sway contract using Sway v0.45:

contract;

pub enum ExampleEnum {
    A: (),
}

abi BugReproduction {
    fn example_fn(e: ExampleEnum);
}

impl BugReproduction for Contract {
    fn example_fn(e: ExampleEnum) {
        match e {
            ExampleEnum::A => {},
        }
    }
}

[ra0x3]

• Looks Ok thanks @deekerno
• Left a small comment regarding style (not a blocker for merge)
• We can cut a patch release for this if necessary - but beta-3 is only gonna last for a few more days anyway