disable flatcc 3p for cmake build

[zonglinpeng]

Differential Revision: D84855081

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❌ 2 New Failures, 1 Cancelled Job

As of commit ce3af8b with merge base 651b357 ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t f398e7278810af6df48e34c2d9573cc968de0d905c94d2976cf45249d4d9361c /exec failed with exit code 1
• Test CUDA Builds / export-voxtral-cuda-artifact / linux-job (gh)
  RuntimeError: Command docker exec -t 07fc17ca37650f76ad4bbf6c7377731304c0c757abfe9cfbaad088e1ffaa190a /exec failed with exit code 2

CANCELLED JOB - The following job was cancelled. Please retry:

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