requirements: update craft-providers to 1.8.0

[mr-cal]

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Update craft-providers to 1.8.0.

The main value-add for rockcraft users is the auto-cleaning of instances that are interrupted during setup.

Changelog

1.8.0 (2023-03-01)

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• Track if instances are properly setup when launching. If the instance did not fully
  complete setup and auto-clean is enabled, the instance will be cleaned and recreated.
• Add new field setup to instance configuration to track set up status
• Update base compatibility tag from base-v0 to base-v1
• Add new BuilddBaseAliases for Lunar and Kinetic
• Add support for interim Ubuntu releases for LXD
• Add support for custom LXD image remotes. LXD remotes can now add any
  remote server to retrieve images from using the RemoteImage class.
• Add deprecation warning for LXD function configure_buildd_image_remote().
  Usage of this function should be replaced with RemoteImage's add_remote().
• Rename BuilddBase function setup_instance_config() to update_compatibility_tag()
• Update brew for macos CI tests
• Update readthedocs link in readme
• Capture subproccess error details when snap removal fails (originally raised by @bencekov for rockcraft)
• Add default for _run_lxc() parameter check=True
• Refactor lxd unit and integration tests
• Enable more pylint checks
• Use new use_base_instance parameter when launching LXD instances from LXDProvider