[llvm] [LLVM][TableGen] Parameterize NumToSkip in DecoderEmitter (PR #135882)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-m68k-linux-cross` running on `suse-gary-m68k-cross` while building `llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/27/builds/8739

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'LLVM :: TableGen/FixedLenDecoderEmitter/conflict.td' FAILED ********************
Exit Code: 134

Command Output (stderr):
--
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/llvm-tblgen -gen-disassembler -I /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/TableGen/FixedLenDecoderEmitter/../../../include /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/TableGen/FixedLenDecoderEmitter/conflict.td -o - 2>/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/test/TableGen/FixedLenDecoderEmitter/Output/conflict.td.tmp # RUN: at line 1
+ /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/llvm-tblgen -gen-disassembler -I /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/TableGen/FixedLenDecoderEmitter/../../../include /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/TableGen/FixedLenDecoderEmitter/conflict.td -o -
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/test/TableGen/FixedLenDecoderEmitter/Output/conflict.td.script: line 2: 520916 Aborted                 (core dumped) /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/llvm-tblgen -gen-disassembler -I /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/TableGen/FixedLenDecoderEmitter/../../../include /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/TableGen/FixedLenDecoderEmitter/conflict.td -o - 2> /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/test/TableGen/FixedLenDecoderEmitter/Output/conflict.td.tmp

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/135882