[CT-2965] fqn selection crashes for external versioned nodes

[MichelleArk]

with a versioned node provided to plugin_manager.get_nodes,

dbt ls --select +dim_customers2
14:11:31  Running with dbt=1.7.0-a1
14:11:31  target not specified in profile 'postgres', using 'default'
14:11:31  Registered adapter: postgres=1.7.0-a1
14:11:31  Found 4 models, 0 sources, 0 exposures, 0 metrics, 352 macros, 0 groups, 0 semantic models
14:11:31  Encountered an error:
list index out of range
14:11:31  Traceback (most recent call last):
  File "/Users/michelleark/src/dbt-core/core/dbt/cli/requires.py", line 87, in wrapper
    result, success = func(*args, **kwargs)
  File "/Users/michelleark/src/dbt-core/core/dbt/cli/requires.py", line 72, in wrapper
    return func(*args, **kwargs)
  File "/Users/michelleark/src/dbt-core/core/dbt/cli/requires.py", line 143, in wrapper
    return func(*args, **kwargs)
  File "/Users/michelleark/src/dbt-core/core/dbt/cli/requires.py", line 172, in wrapper
    return func(*args, **kwargs)
  File "/Users/michelleark/src/dbt-core/core/dbt/cli/requires.py", line 219, in wrapper
    return func(*args, **kwargs)
  File "/Users/michelleark/src/dbt-core/core/dbt/cli/requires.py", line 259, in wrapper
    return func(*args, **kwargs)
  File "/Users/michelleark/src/dbt-core/core/dbt/cli/main.py", line 507, in list
    results = task.run()
  File "/Users/michelleark/src/dbt-core/core/dbt/task/list.py", line 139, in run
    return self.output_results(generator())
  File "/Users/michelleark/src/dbt-core/core/dbt/task/list.py", line 143, in output_results
    for result in results:
  File "/Users/michelleark/src/dbt-core/core/dbt/task/list.py", line 83, in generate_selectors
    for node in self._iterate_selected_nodes():
  File "/Users/michelleark/src/dbt-core/core/dbt/task/list.py", line 61, in _iterate_selected_nodes
    nodes = sorted(selector.get_selected(spec))
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 303, in get_selected
    selected_nodes, indirect_only = self.select_nodes(spec)
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 158, in select_nodes
    direct_nodes, indirect_nodes = self.select_nodes_recursively(spec)
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 130, in select_nodes_recursively
    bundles = [self.select_nodes_recursively(component) for component in spec]
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 130, in <listcomp>
    bundles = [self.select_nodes_recursively(component) for component in spec]
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 130, in select_nodes_recursively
    bundles = [self.select_nodes_recursively(component) for component in spec]
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 130, in <listcomp>
    bundles = [self.select_nodes_recursively(component) for component in spec]
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 130, in select_nodes_recursively
    bundles = [self.select_nodes_recursively(component) for component in spec]
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 130, in <listcomp>
    bundles = [self.select_nodes_recursively(component) for component in spec]
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 128, in select_nodes_recursively
    direct_nodes, indirect_nodes = self.get_nodes_from_criteria(spec)
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 82, in get_nodes_from_criteria
    collected = self.select_included(nodes, spec)
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector.py", line 68, in select_included
    return set(method.search(included_nodes, spec.value))
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector_methods.py", line 215, in search
    if self.node_is_match(selector, real_node.fqn, real_node.is_versioned):
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector_methods.py", line 203, in node_is_match
    elif is_selected_node(unscoped_fqn, qualified_name, is_versioned):
  File "/Users/michelleark/src/dbt-core/core/dbt/graph/selector_methods.py", line 62, in is_selected_node
    if fqn[-2] == node_selector:
IndexError: list index out of range

root cause: versioned model fqn should always contain 3 elements (including the version)