fix( gcp_chronicle sink): add content encoding header when compression is enabled (#22009)

* fix(#22007): add content encoding header when compression is enabled

* docs(#22007): add change log file

* Update changelog.d/22007_chronicle_ingest_header.fix.md

Co-authored-by: Pavlos Rontidis <pavlos.rontidis@gmail.com>

* cargo fmt

* revert Cargo.lock

* clippy fixes

* clippy fixes

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Co-authored-by: Matt Searle <matt.searle@10xbanking.com>
Co-authored-by: Pavlos Rontidis <pavlos.rontidis@gmail.com>