Merge 26d71d9ed56c4c23e6284dac7a9bdf603a5801f3 into 18.x

[brad0]

[llvm-readobj,ELF] Support --decompress/-z (#82594)

When a section has the SHF_COMPRESSED flag, -p/-x dump the compressed
content by default. In GNU readelf, if --decompress/-z is specified,
-p/-x will dump the decompressed content. This patch implements the
option.

Close #82507

[brad0]

/cherry-pick 26d71d9

[llvmbot]

/pull-request #82693

[llvmbot]

Failed to cherry-pick: 26

https://github.com/llvm/llvm-project/actions/runs/8011413809

Please manually backport the fix and push it to your github fork. Once this is done, please create a pull request