[llvm] [DirectX] Add `extract-section` to `llvm-objcopy` and implement it for `DXContainer` (PR #154804)

[James Henderson via llvm-commits]

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@@ -39,7 +37,7 @@
 # CHECK-NEXT      NumStaticSamplers: 0
 # CHECK-NEXT      StaticSamplersOffset: 24
 # CHECK-NEXT      Parameters:      []
-# CHECK-NOT: PSV0
+# CHECK-NOT:  - Name: {{DXIL|SFI0|HASH|ISG1|OSG1|PSV0}}
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jh7370 wrote:

Is the `-` part of this check correct? More generally, could you just do `CHECK-NOT: Name:`? Same applies for both before and after.

https://github.com/llvm/llvm-project/pull/154804