Fix: remove non-existent reference in 'pipeline.yaml' for local deployment, build missing pipeline images

[tollsimy]

This PR fixes the following issue when starting a local deployment with a 'kernelci-pipeline-lava-callback' service with the default pipeline.yaml.

Steps to reproduce:

cd localinstall
python kci-deploy.py
cd kernelci/kernelci-pipeline
docker-compose -f docker-compose-lava.yaml up

Issue:

Traceback (most recent call last):
  File "/home/kernelci/pipeline/lava_callback.py", line 34, in <module>
    CONFIGS = kernelci.config.load(
              ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kernelci/config/__init__.py", line 191, in load
    data = load_yaml(config_paths)
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kernelci/config/__init__.py", line 149, in load_yaml
    data = load_single_yaml(path)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kernelci/config/__init__.py", line 86, in load_single_yaml
    for _, data in iterate_yaml_files(config_path):
  File "/usr/local/lib/python3.11/site-packages/kernelci/config/__init__.py", line 30, in iterate_yaml_files
    data = yaml.safe_load(yaml_file)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/__init__.py", line 125, in safe_load
    return load(stream, SafeLoader)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/__init__.py", line 81, in load
    return loader.get_single_data()
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/constructor.py", line 49, in get_single_data
    node = self.get_single_node()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 36, in get_single_node
    document = self.compose_document()
               ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 55, in compose_document
    node = self.compose_node(None, None)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 133, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 133, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 84, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 133, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yaml/composer.py", line 68, in compose_node
    raise ComposerError(None, None, "found undefined alias %r"
yaml.composer.ComposerError: found undefined alias 'build-variants'
  in "config/pipeline.yaml", line 189, column 15

and add the build of missing pipeline images (related to kernelci/kernelci-pipeline#1102).

[nuclearcat]

LGTM