release 0.49.0 (googleapis#3310)

Post-release cleanup and fixes (specific to recent repository restruc…

…ture) (googleapis#3290)

1) Fix poms deployment config.
2) Fix documentaiton links in readmes.
3) Update main README (remove `goolge-cloud` metapackage reference).
4) Update `RELEASING.md` to reflect changes. The instructions try to avoid having mysterious scripts running in the release process and also ensures that all disruptive operations (actual release/push) are done explicitly and not somewhere in the middle of a mysterious script.
5) Remove `deploy.sh` and `finalize_release.sh` scripts.
6) Fix few previously broken links (bigquerydatatransfer and compute apidocs links)

Release 0.47.0/1.29.0 (googleapis#3239)

Also fix javadoc

Release 0.46.0/1.28.0

Release 0.45.0 (googleapis#3174)

Release 0.44.0 (googleapis#3161)

Release 0.43.0/1.25.0 (googleapis#3127)

Release 0.42.1

Release 0.43.0 (googleapis#3095)

Release 0.41.0 (googleapis#3076)