Pubtools-quay

* Support pre-release containers
* Better error reporting for skopeo copy commands
* Local executor for tag-docker operatoin

What's Changed
* Trigger building index images in parallel by zxiong in https://github.com/release-engineering/pubtools-quay/pull/175
* Make request session object per thread by zxiong in https://github.com/release-engineering/pubtools-quay/pull/177

**Full Changelog**: https://github.com/release-engineering/pubtools-quay/compare/v0.11.2...v0.11.3

What's Changed
* Use hotfix tag to sign an hotfix index image by chandwanitulsi in https://github.com/release-engineering/pubtools-quay/pull/172
* Remove less signatures [CLOUDDST-19242] by emilyzheng in https://github.com/release-engineering/pubtools-quay/pull/173
* Add logs for adding and removing signatures by querti in https://github.com/release-engineering/pubtools-quay/pull/174

New Contributors
* chandwanitulsi made their first contribution in https://github.com/release-engineering/pubtools-quay/pull/172

**Full Changelog**: https://github.com/release-engineering/pubtools-quay/compare/v0.11.1...v0.11.2

New Contributors
* jm-wk made their first contribution in https://github.com/release-engineering/pubtools-quay/pull/166

**Full Changelog**: https://github.com/release-engineering/pubtools-quay/compare/v0.11.0...v0.11.1

* Fix race condition in parallel container pushes
* Delete signatures in parallel
* Do not execute iib operation on fbc errors
* Better error message when operator item fails due to fbc inconsistency
* Change FBC logic to not call IIB only when ocp_version >=4.13
* Unpin requests-mock version
* Set request threads for uploading signatures
* Reformatted with new tox version
* Added support for FBC operators
* Drop Python2 support
* Use namespace from index image target settings
* Make iib_deprecation_list_url optional target settings