Fix missing dependency on nav2_costmap_2d

[Ryanf55]

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Basic Info

Info	Please fill out this column
Primary OS tested on	Ubuntu 24

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Description of contribution in a few bullet points

• Fix missing dependencies found when refactoring nav2_core to remove the dependency on nav2_costmap_2d. Without this, nav2_controller would fail to build because it didn't know about the nav2_costmap_2d::nav2_costmap_2d_core target

--- stderr: nav2_controller                                                                                                                                                                
CMake Error at CMakeLists.txt:35 (target_link_libraries):
  Target "controller_server_core" links to:

    nav2_costmap_2d::nav2_costmap_2d_core

  but the target was not found.  Possible reasons include:

    * There is a typo in the target name.
    * A find_package call is missing for an IMPORTED target.
    * An ALIAS target is missing.

CMake Error at CMakeLists.txt:113 (target_link_libraries):
  Target "simple_goal_checker" links to:

    nav2_costmap_2d::nav2_costmap_2d_core

  but the target was not found.  Possible reasons include:

    * There is a typo in the target name.
    * A find_package call is missing for an IMPORTED target.
    * An ALIAS target is missing.

CMake Error at CMakeLists.txt:134 (target_link_libraries):
  Target "stopped_goal_checker" links to:

    nav2_costmap_2d::nav2_costmap_2d_core

  but the target was not found.  Possible reasons include:

    * There is a typo in the target name.
    * A find_package call is missing for an IMPORTED target.
    * An ALIAS target is missing.

For Maintainers:

• [ ] Check that any new parameters added are updated in docs.nav2.org
• [ ] Check that any significant change is added to the migration guide
• [ ] Check that any new features OR changes to existing behaviors are reflected in the tuning guide
• [ ] Check that any new functions have Doxygen added
• [ ] Check that any new features have test coverage
• [ ] Check that any new plugins is added to the plugins page
• [ ] If BT Node, Additionally: add to BT's XML index of nodes for groot, BT package's readme table, and BT library lists

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

see 1 file with indirect coverage changes