These were added in https://github.com/llvm/llvm-project/pull/165803.

Mostly mechanical changes to add the missing field.

This commit moves the "element" param of `DICompositeType` to the end of
the parameter list. This is required as there seems to be a bug in the
attribute parser that breaks a print + parse roundtrip.

Related ticket: https://github.com/llvm/llvm-project/issues/156623

This reverts commit 7ae964c55b0a2b8dccf076ced9f1ffa8d5487eca.

Revert "[mlir] Fix warnings"

This reverts commit 0e43b9547d56762d29de9a99c998e7939417a1f3.

LLVM already supports `DW_TAG_LLVM_annotation` entries for subprograms,
but this hasn't been surfaced to the LLVM dialect.
I'm doing the minimal amount of work to support string-based
annotations, which is useful for attaching metadata to
functions, which is useful for debuggers to offer features beyond basic
DWARF.
As LLVM already supports this, this patch is not controversial.

This reverts commit fa93be4, restoring
commit d884b77, with fixes that ensure the CAPI declarations are
exported properly.

This commit implements LLVM_DIRecursiveTypeAttrInterface for the
DISubprogramAttr to ensure cyclic subprograms can be imported properly.
In the process multiple shortcuts around the recently introduced
DIImportedEntityAttr can be removed.