feat(deps, vrl): Update VRL to 0.6.0 (#18150)

* chore: Update VRL to 0.6.0

* manually update VRL docs

* update spelling allow.txt

* cue whitespaces fixes

* ran dd-rust-license-tool write

* first attempt to add a 'deprecated' badge

* fix vrl tests

* update/fix docs

* ran cue fmt again

* Update website/layouts/partials/data.html

Co-authored-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>

* fix tests, skip deprecated tests

* cue fmt

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Co-authored-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>