chore(releasing): v0.49.0 release (#23579)

* chore(releasing): prepare v0.49.0 release (#23563)

* chore(releasing): Pinned VRL version to 0.26.0

* chore(releasing): Generated release CUE file

* chore(releasing): Updated website/cue/reference/administration/interfaces/kubectl.cue vector version to 0.49.0

* chore(releasing): Updated distribution/install.sh vector version to 0.49.0

* chore(releasing): Add 0.49.0 to versions.cue

* chore(releasing): Created release md file

* Apply suggestions from code review

* edit

* added description

* authors

* add upgrade guide wip

* upgrade guide changes

* Apply suggestions from code review

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

* improve breaking guide

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Co-authored-by: Thomas <thomas.schneider@datadoghq.com>

* cargo vdev build manifests

* Bump version to next release

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