[ci] add exec permissionn to downloaded binaries

[drmingdrmer]

I hereby agree to the terms of the CLA available at: https://databend.rs/dev/policies/cla/

Summary

[ci] add exec permission to downloaded binaries

• fix permission error in feat: Add decompress support for COPY INTO and streaming loading #5655

Changelog

Related Issues

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1 Ignored Deployment

Name	Status	Preview	Updated
databend	⬜️ Ignored (Inspect)		May 29, 2022 at 2:50PM (UTC)

[mergify]

Thanks for the contribution!
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Please review the labels and make any necessary changes.

[Xuanwo]

Please also check the download link is correct. I got a 404 error while trying to download the file.

In log we have: https://github.com/datafuselabs/databend/releases/download/v-nightly/databend-v-nightly-x86_64-unknown-linux-gnu.tar.gz

[drmingdrmer]

Please also check the download link is correct. I got a 404 error while trying to download the file.

In log we have: https://github.com/datafuselabs/databend/releases/download/v-nightly/databend-v-nightly-x86_64-unknown-linux-gnu.tar.gz

It should be correct. The version should not be empty if there was not the
permission error.

https://github.com/datafuselabs/databend/releases/download/v{0.7.63}-nightly/databend-v-nightly-x86_64-unknown-linux-gnu.tar.gz
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