[release/v1.40.x] Prepare release 1.40.0 (open-telemetry#6556)

[release/v1.39.x] Prepare release 1.39.0 (open-telemetry#6508)

[release/v1.38.x] Prepare release 1.38.0 (open-telemetry#6446)

[release/v1.37.x] Prepare release 1.37.0 (open-telemetry#6355)

[release/v1.36.x] Prepare release 1.36.0 (open-telemetry#6278)

[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)