Use concrete step data class when injecting requires

Besides raw data, `Step.delegate()` can accept data class instance too.
Converting `prepare` step to use this method to provide better type
safety.

tmt/steps/prepare/__init__.py

@@ -267,7 +267,7 @@ def as_key(self) -> frozenset['tmt.base.DependencySimple']:
  #
  # 1. make the list of requirements unique,
  # 2. group guests with same requirements.
- from tmt.steps.prepare.install import _RawPrepareInstallStepData
+ from tmt.steps.prepare.install import PrepareInstallData
 
  pruned_requires: dict[frozenset[tmt.base.DependencySimple], DependencyCollection] = {}
  pruned_recommends: dict[frozenset[tmt.base.DependencySimple], DependencyCollection] = {}
@@ -294,34 +294,31 @@ def as_key(self) -> frozenset['tmt.base.DependencySimple']:
  if not collection.dependencies:
  continue
 
- data: _RawPrepareInstallStepData = {
- 'how': 'install',
- 'name': 'requires',
- 'summary': 'Install required packages',
- 'order': tmt.utils.DEFAULT_PLUGIN_ORDER_REQUIRES,
- 'where': [guest.name for guest in collection.guests],
- 'package': [
- dependency.to_spec()
- for dependency in collection.dependencies
- ]}
- self._phases.append(PreparePlugin.delegate(self, raw_data=data))
+ data = PrepareInstallData(
+ name='requires',
+ how='install',
+ summary='Install required packages',
+ order=tmt.utils.DEFAULT_PLUGIN_ORDER_REQUIRES,
+ where=[guest.name for guest in collection.guests],
+ package=collection.dependencies
+ )
+
+ self._phases.append(PreparePlugin.delegate(self, data=data))
 
  for collection in pruned_recommends.values():
  if not collection.dependencies:
  continue
 
- data = {
- 'how': 'install',
- 'name': 'recommends',
- 'summary': 'Install recommended packages',
- 'order': tmt.utils.DEFAULT_PLUGIN_ORDER_RECOMMENDS,
- 'where': [guest.name for guest in collection.guests],
- 'package': [
- dependency.to_spec()
- for dependency in collection.dependencies
- ],
- 'missing': 'skip'}
- self._phases.append(PreparePlugin.delegate(self, raw_data=data))
+ data = PrepareInstallData(
+ how='install',
+ name='recommends',
+ summary='Install recommended packages',
+ order=tmt.utils.DEFAULT_PLUGIN_ORDER_RECOMMENDS,
+ where=[guest.name for guest in collection.guests],
+ package=collection.dependencies,
+ missing='skip')
+
+ self._phases.append(PreparePlugin.delegate(self, data=data))
 
  # Prepare guests (including workdir sync)
  guest_copies: list[Guest] = []