[clang] [clang][NFC] Reduce one of JSON dump tests (PR #195026)

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

All of these commits have changes to the JSON dump part of this file which are relevant to the commit in question:
fb024337497f4c158ea16bfb90e50138d9a2a0c6
91ebd4ac4ac4b11653a26b3a04af5b94ccda7e4c
696946f897db90d07dbfb981ad8e75fd872a1d35
398f6c271d4b408f7e783c29d5bfcd5413eae76d
ba9d1c41c41d568a798e0a8c38a89d294647c28d
0e3319537972d284e94a183899f15b40a798fd1f
eeada0d30f41b2d680073e49246ac0388e6c5ec7
91cdd35008e9ab32dffb7e401cdd7313b3461892
13b55ad3bb6bafda7d8a62c5fe2fc98157442355
dc17429ae6961a6783371dcf6749eea657b5446a
89cfeeb062577069d1da236d33810bb0416f1102
14f7bd63b95d0f61a6f47119ac66398ca230559a

https://github.com/llvm/llvm-project/pull/195026