fix codecov CI by freeing disk space · DA0-DA0/dao-contracts@e10f30f

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v2, actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

output filename collision.

unused import: `dao_interface::proposal::InfoResponse`

unused import: `crate::state::BeforeSendHookInfo`

`dao-pre-propose-base` (lib) generated 1 warning (run `cargo fix --lib -p dao-pre-propose-base` to apply 1 suggestion)

`cw-tokenfactory-issuer` (lib) generated 1 warning (run `cargo fix --lib -p cw-tokenfactory-issuer` to apply 1 suggestion)

unused import: `ActiveThresholdResponse`

`dao-voting-cw20-staked` (lib) generated 1 warning (run `cargo fix --lib -p dao-voting-cw20-staked` to apply 1 suggestion)

unused import: `cosmwasm_std::Uint128`

unused import: `dao_interface::voting::InfoResponse`

`dao-proposal-hook-counter` (lib) generated 1 warning (run `cargo fix --lib -p dao-proposal-hook-counter` to apply 1 suggestion)

unused import: `ActiveThresholdResponse`

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