test(serving-functions): add CLI output on failure

[erezrokah]

- Summary

Print the CLI output when the serving functions tests fail

- Test plan

Existing tests

- A picture of a cute animal (not mandatory but encouraged)
🐼

[github-actions]

📊 Benchmark results

Comparing with 3b49f19

Package size: 331 MB

(no change)

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└───┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴──>
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Legend

• T-30 (3b49f19): 331 MB
• T-29 (32b676d): 331 MB
• T-28 (a266401): 331 MB
• T-27 (0c25824): 331 MB
• T-26 (9e2f824): 331 MB
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• T-23 (a5fbf9c): 331 MB
• T-22 (c2ff616): 331 MB
• T-21 (95b7e3b): 331 MB
• T-20 (384d681): 331 MB
• T-19 (a9316b5): 331 MB
• T-18 (d895c34): 331 MB
• T-17 (fb61827): 331 MB
• T-16 (d863fba): 331 MB
• T-15 (e372a60): 331 MB
• T-14 (72c97d0): 331 MB
• T-13 (5c5c69b): 331 MB
• T-12 (c2ab2f0): 331 MB
• T-11 (54f636f): 331 MB
• T-10 (31ac74c): 331 MB
• T-9 (31a38ca): 331 MB
• T-8 (2d0c063): 331 MB
• T-7 (e90c153): 331 MB
• T-6 (0888487): 331 MB
• T-5 (9af4d94): 331 MB
• T-4 (4bc92c6): 331 MB
• T-3 (8f03a1b): 331 MB
• T-2 (268e390): 331 MB
• T-1 (7863548): 331 MB
• T (current commit): 331 MB

[eduardoboucas]

🙏🏻