prepping for 1.1.0-beta release

- Updating and documenting changelog creation process.
  antsibull-changelog was chosen because it is the standard tooling
  recommended by Ansible developers.
- Documenting the release process and several others so others can perform it in the
  future.
- Updating the integration tests to test against 2.13, which the 1.1.0
  final release will be certified for.
- Created changelog and update galaxy.yaml for 1.1.0-beta, which will be
  the next release.

changelogs/config.yaml

@@ -0,0 +1,32 @@
+changelog_filename_template: ../CHANGELOG.rst
+changelog_filename_version_depth: 0
+changes_file: changelog.yaml
+changes_format: combined
+ignore_other_fragment_extensions: true
+keep_fragments: false
+mention_ancestor: true
+new_plugins_after_name: removed_features
+notesdir: fragments
+prelude_section_name: release_summary
+prelude_section_title: Release Summary
+sanitize_changelog: true
+sections:
+- - major_changes
+  - Major Changes
+- - minor_changes
+  - Minor Changes
+- - breaking_changes
+  - Breaking Changes / Porting Guide
+- - deprecated_features
+  - Deprecated Features
+- - removed_features
+  - Removed Features (previously deprecated)
+- - security_fixes
+  - Security Fixes
+- - bugfixes
+  - Bugfixes
+- - known_issues
+  - Known Issues
+title: Google.Cloud
+trivial_section_name: trivial
+use_fqcn: true