Prepare release v1.6.2 and 0.25b2 (open-telemetry#2230)

updating changelogs and version to 1.6.1-0.25b1 (open-telemetry#2223)

sha

updating changelogs and version to 1.6.0-0.25b0 (open-telemetry#2193)

updating changelogs and version to 1.5.0-0.24b0 (open-telemetry#2069)

hotfix: 1.4.1 0.23b2 (open-telemetry#1999)

updating changelogs and version to 1.4.0-0.23b0 (open-telemetry#1965)

Release for V1.3.0 and 0.22b0, update release script (open-telemetry#…

…1883)

updating changelogs and version to 1.2.0, 0.21b0 (open-telemetry#1841)

Release 1.1.0/0.20b0 (open-telemetry#1783)