Polemarch

Changelog:
* Feature(git): Provide to setup config params for git operations.
* Feature(CI): Deploy latest release with `werf export`.
* Feature(service): Deploy Polemarch to k8s via werf
* Feature(backend): Add project and execution metrics.
* Feature(backend): Process `override` field in template execute action.
* Fix(docs): RTD can't build docs.
* Chore(deps): Update vstutils to 5.2.1.
* Chore(api): Use schema field inspection for inventory field.
* Chore(CI): Migrate to lightweight image for js linting.
* Chore(tests): Add unit tests for ansible plugins.
* Chore(deps): Update frontend dependencies.
* Chore(deps): Update vstutils to 5.2.4.
* Chore: Fix typo in "Statistics" word.
* Refactoring: Move template kind/plugin map to constants.
* Refactoring: Remove ACL handlers.
* Refactoring: Remove default permission `ModelPermission` and use single `SetOwnerPermission`.
* Refactoring: Remove `BaseModel`, `BModel` and so on and use them from vstutils.
* Optimization: Optimize `filter_by_user` query.
* Docs: Add info about sqlite troubles with nested groups.

Changelog:
* Fix(backend): `ansible_ssh_private_key_file` not generates in execution folder.

Changelog:
* Feature: Create plugins system which allows to execute custom command from Polemarch.
* Fix: Fix FK inventory field showing id instead of name (vstutils>=5.2.0).
* Fix: Add patch to `setup.py` which raises compile error if frontend hasn't built.
* Refactor: Use `BaseEnum.LOWER` in enums.
* Refactor: `test_community_templates` now uses `MockServer` and doesn't make calls outside.
* Refactor: Get rid of weird template execution approach with test client and use PLUGIN_HANDLERS instead.
* Chore: Update vstutils to 5.1.11.
* Chore: Add `openssh-client` dependency to production docker build.

Changelog:
* Feature(service): Split notifications about updates in centrifugo by labels.
* Feature: Display values of view field in breadcrumbs instead of id.
* Chore(deps): Update vstutils to 5.1 release.
* Fix(UI): Fix pagination, groups surfing, etc.
* Optimization(api): Improve serialization performance.
* Optimization(UI): Less requests to api.

Changelog:
* Fix: `repo_sync_on_run` in git projects with credentials now working.

Changelog:
* Optimization: Improve performance for worker's initialization and memory usage.
* Feature: Clone/download project directly from source on `repo_sync_on_run` enabled.
* Feature: Set `ANSIBLE_CONFIG` env variable in project.
* Feature: Provide setup `max_content_length` in config for TAR downloading.
* Fix: Reimplement `repo_sync_on_run_timeout`.
* Fix: Bug with updating execution template from host list inventory to FK inventory.
* Chore: Bump `requests` lib version to `2.27.1`.
* Chore: Bump `vstutils` to `5.0.13`.