[release/v1.35.x] Prepare release 1.35.0 (open-telemetry#6215)

[release/v1.34.x] Prepare release 1.34.1 (open-telemetry#6144)

[release/v1.34.x] Prepare release 1.34.0 (open-telemetry#6117)

[release/v1.33.x] Prepare release 1.33.0 (open-telemetry#6066)

[release/v1.32.x] Prepare release 1.32.0 (open-telemetry#5980)

[release/v1.31.x] Prepare release 1.31.0 (open-telemetry#5889)

[release/v1.30.x] Prepare release 1.30.1 (open-telemetry#5814)

[release/v1.30.x] Prepare release 1.30.0 (open-telemetry#5801)

[release/v1.29.x] Prepare release 1.29.0 (open-telemetry#5705)

[release/v1.28.x] Prepare release 1.28.0 (open-telemetry#5608)