fix: fix component install when fail to be installed at the first time

[Halimao]

fuelup toolchain install latest won't work properly if fail to be installed at the first time.

When we run fuelup toolchain install latest again, it will show all components are installed. Actually, the components which were failed to be installed at first time are still missing.

The reason is downloader will create file before downloading process start and won't delete file after downloading process is fail. Also, add_component checks the component file ~/.fuelup/store/{component-version}-xxx.tar.gz is exist, and then won't install the component anymore.

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logs about fuelup toolchain install latest been executed at first time:

The Fuel toolchain is partially installed.
fuelup failed to install: - Could not add component forc-wallet(0.3.0): Failed to download forc-wallet-0.3.0-x86_64-unknown-linux-gnu.tar.gz - Unexpected error: https://github.com/FuelLabs/forc-wallet/releases/download/v0.3.0/forc-wallet-0.3.0-x86_64-unknown-linux-gnu.tar.gz: Network Error: Network Error: Error encountered in the status line: unexpected end of file. The release may not be ready yet.
- Could not add component fuel-core(0.20.5): Failed to download fuel-core-0.20.5-x86_64-unknown-linux-gnu.tar.gz - Unexpected error: https://github.com/FuelLabs/fuel-core/releases/download/v0.20.5/fuel-core-0.20.5-x86_64-unknown-linux-gnu.tar.gz: Connection Failed: Connect error: connection timed out. The release may not be ready yet.
- Could not add component fuel-core-keygen(0.20.5): Failed to download fuel-core-keygen-0.20.5-x86_64-unknown-linux-gnu.tar.gz - response body closed before all bytes were read. The release may not be ready yet.

logs about fuelup toolchain install latest been executed again.

Downloading: forc forc-explore forc-index forc-wallet fuel-core fuel-core-keygen fuel-indexer 

Adding component forc v0.46.1 to 'latest-x86_64-unknown-linux-gnu'
Installed forc v0.46.1 for toolchain 'latest-x86_64-unknown-linux-gnu'

Adding component forc-explore v0.28.1 to 'latest-x86_64-unknown-linux-gnu'
Installed forc-explore v0.28.1 for toolchain 'latest-x86_64-unknown-linux-gnu'

Adding component forc-index v0.23.0 to 'latest-x86_64-unknown-linux-gnu'
Installed forc-index v0.23.0 for toolchain 'latest-x86_64-unknown-linux-gnu'

Adding component forc-wallet v0.3.0 to 'latest-x86_64-unknown-linux-gnu'
Installed forc-wallet v0.3.0 for toolchain 'latest-x86_64-unknown-linux-gnu'

Adding component fuel-core v0.20.5 to 'latest-x86_64-unknown-linux-gnu'
Installed fuel-core v0.20.5 for toolchain 'latest-x86_64-unknown-linux-gnu'

Adding component fuel-core-keygen v0.20.5 to 'latest-x86_64-unknown-linux-gnu'
Installed fuel-core-keygen v0.20.5 for toolchain 'latest-x86_64-unknown-linux-gnu'

Adding component fuel-indexer v0.23.0 to 'latest-x86_64-unknown-linux-gnu'
Installed fuel-indexer v0.23.0 for toolchain 'latest-x86_64-unknown-linux-gnu'

Installed:
- forc 0.46.1
- forc-explore 0.28.1
- forc-index 0.23.0
- forc-wallet 0.3.0
- fuel-core 0.20.5
- fuel-core-keygen 0.20.5
- fuel-indexer 0.23.0

[sdankel]

Tested it locally and it seems to be working well. Thanks!

[Halimao]

@sdankel Hi, update the code style to let ci cargo-fmt-check happy~

[Halimao]

@sdankel Hi sir, can we get this merged, as this is a bug fix😀