test(tests-integration): await until node is alive

[Itay-Tsabary-Starkware]

Stack:

• test(tests-integration): send txs in e2e integration test #1895
• test(tests-integration): await until node is alive #1894 ⬅
• test(tests-integration): run node in integration test #1893
• test(tests-integration): add setup and state reader spawn to e2e integration test #1892
• test(tests-integration): add e2e integration test skeleton #1891

⚠️ Part of a stack created by spr. Do not merge manually using the UI - doing so may have unexpected results.

[reviewable-StarkWare]

This change is 

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[github-actions]

Benchmark movements:
tree_computation_flow performance improved 😺
tree_computation_flow time: [33.712 ms 33.746 ms 33.782 ms]
change: [-2.6948% -2.3434% -2.0237%] (p = 0.00 < 0.05)
Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
3 (3.00%) high mild

full_committer_flow performance improved 😺
full_committer_flow time: [29.256 ms 29.288 ms 29.320 ms]
change: [-5.4446% -4.7658% -4.1432%] (p = 0.00 < 0.05)
Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high mild

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.82%. Comparing base (bad620c) to head (4b939a7).

Additional details and impacted files

@@                  Coverage Diff                   @@
##           spr/main/61787bd4    #1894       +/-   ##
======================================================
+ Coverage              29.32%   76.82%   +47.49%     
======================================================
  Files                    264      368      +104     
  Lines                  30655    39230     +8575     
  Branches               30655    39230     +8575     
======================================================
+ Hits                    8991    30137    +21146     
+ Misses                 20783     6834    -13949     
- Partials                 881     2259     +1378     

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[ArniStarkware]

I don't know much about this keep-alive client, but I am not sure there is much to know.
Approved.

Reviewed 3 of 3 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @Itay-Tsabary-Starkware)

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[ArniStarkware]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @Itay-Tsabary-Starkware)

[Itay-Tsabary-Starkware]

✓ Commit merged in pull request #1895