[llvm] [ObjectYAML][NFC] Extract BBAddrMap YAML types into shared namespace (PR #196019)

[James Henderson via llvm-commits]

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@@ -1504,7 +1504,7 @@ void ELFState<ELFT>::writeSectionContent(
     uint64_t TotalNumBlocks = 0;
     bool EmitCallsiteEndOffsets =
         FeatureOrErr->CallsiteEndOffsets || E.hasAnyCallsiteEndOffsets();
-    for (const ELFYAML::BBAddrMapEntry::BBRangeEntry &BBR : *E.BBRanges) {
+    for (const BBAddrMapYAML::BBAddrMapEntry::BBRangeEntry &BBR : *E.BBRanges) {
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jh7370 wrote:

Agreed that it doesn't belong in this PR, but Copilot isn't wrong in that we shouldn't be dereferencing `FeatureOrErr` if it contains an error state.

https://github.com/llvm/llvm-project/pull/196019