chore: 0.23.0 release proposal (open-telemetry#560)

* chore: 0.23.0 release proposal

* chore: changelog

Co-authored-by: obecny <obecny@users.noreply.github.com>
Co-authored-by: Daniel Dyla <dyladan@users.noreply.github.com>

chore: 0.22.0 release proposal (open-telemetry#547)

* chore: 0.22.0 release proposal

* chore: changelog

Co-authored-by: dyladan <dyladan@users.noreply.github.com>

chore: 0.21.0 release proposal (open-telemetry#536)

Co-authored-by: vmarchaud <vmarchaud@users.noreply.github.com>
Co-authored-by: vmarchaud <contact@vmarchaud.fr>

chore: 0.20.0 release proposal (open-telemetry#520)

Co-authored-by: dyladan <dyladan@users.noreply.github.com>

chore: make aws generator public (open-telemetry#454)

chore: 0.15.0 release proposal (open-telemetry#409)

Co-authored-by: dyladan <dyladan@users.noreply.github.com>

v0.14.0 proposal (open-telemetry#385)

* chore: 0.14.0 proposal

* chore: changelog

Merge pull request open-telemetry#371 from dynatrace-oss-contrib/bump…

…-contrib

Merge pull request open-telemetry#316 from dynatrace-oss-contrib/0.13…

….0-proposal

Merge pull request open-telemetry#304 from dynatrace-oss-contrib/0.12…

….1-proposal

chore: v0.12.1 proposal