Automatic update for tmt-1.21.0-1.fc38.

Changelog

* Fri Feb  3 2023 Lukáš Zachar <lzachar@redhat.com> - 1.21.0-1
- Fix tmt-reboot without custom command
- Fix test /discover/libraries
- Add serialization callbacks to data class fields
- Use own private key for `provision.virtual`
- Adds a template-backed export plugin
- Polarion export fix component upload bug and upload id first
- Convert story ReST export to use a Jinja2 template
- Convert export-related code to plugins per format
- Do not clone the whole remote plan in dry mode
- Hardcode tmt git URL so test won't fail for PRs
- Add py.typed marker for 3rd party type annotations
- Fixes isort 5.10.1 installation issue
- Improve logging by `tmt.utils.wait()`
- Check packages are installed via debuginfo-install
- Always ignore failures for recommended packages
- Merge report plugins options into step data fields
- Dynamically find the current Fedora release
- Suggest using a pull request checklist template
- Include a simple Python code among the examples
- Apply normalization callback when updating data with CLI input
- Bump pre-commit linters - Flake8, Mypy, JSON schema, YAML lint & pygrep
- Use base implementation of provision plugin requirements
- Relay 'interactive' value for podman call
- Update Fedora versions in `upgrade` tests
- Apply `ShellScript` for the custom reboot command
- Update the `shell` discover specification
- Enable to sync git repo to SUT in `shell` discover
- Increase the default `utils.format()` indent a bit
- Define pull request Copr build job in Packit config
- Decouple logging from objects and base classes
- Enable `url` and `ref` as `shell` discover options
- Export `TMT_TREE` in other steps as well
- Add a new key `system` to the `hardware` spec
- Remove default for the dynamic `ref` evaluation
- Schema update and test for order in discover step
- Merge report plugins options into step data fields
- Add a test for hardware schema coverage
- Better type annotations of prepare/install scripts
- Move `jinja2` require to the main `tmt` package
- Define the new context dimension `initiator`
- Respect `TMT_WORKDIR_ROOT` variable in `testcloud`
- Annotate commands, command line elements and shell scripts
- Adjust the `reportportal` plugin implementation
- Implement the `reportportal` report plugin
- Require the latest `testcloud` package
- Define `srpm_build_deps` in the packit config
- Include the new web link in verbose `show` mode
- Add a clickable web link to test to polarion export
- Enhance `Links` to allow checking for any links at all
- Drop various guest `wake()` methods in favor of parent class
- Catch `SystemExit` during module discovery