CI: speed up Allure reports upload

[bayandin]

Problem

create-test-report job takes more than 8 minutes, the longest step is uploading Allure report to S3:

Before (link):

+ aws s3 cp --recursive --only-show-errors /tmp/pr-7362-1712847045/report s3://neon-github-public-dev/reports/pr-7362/8647730612

real	6m10.572s
user	6m37.717s
sys	1m9.429s

After (link):

+ s5cmd --log error cp '/tmp/pr-7362-1712858221/report/*' s3://neon-github-public-dev/reports/pr-7362/8650636861/

real	0m9.698s
user	1m9.438s
sys	0m6.419s

Summary of changes

• Add s5cmd(https://github.com/peak/s5cmd) to build-tools image
• Use s5cmd instead of aws s3 for uploading Allure report

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• Do we need to implement analytics? if so did you add the relevant metrics to the dashboard?
• If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section.

Checklist before merging

• Do not forget to reformat commit message to not include the above checklist

[github-actions]

2754 tests run: 2636 passed, 0 failed, 118 skipped (full report)

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Code coverage* (full report)

• functions: 28.0% (6413 of 22880 functions)
• lines: 46.7% (44988 of 96288 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
21ea9ba at 2024-04-11T17:58:44.736Z :recycle:}