Fix for setting dynamically the footprint_clearing_enabled parameter in the StaticLayer costmap_2d plugin (backport #4885)

[mergify]

In the StaticLayer costmap2d_plugin , the parameter footprint_clearing_enabled was never changed dynamically in the callback, because the else if condition has a duplicated condition (same as in line 490 and line 500), so it never executed setting that parameter.

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Basic Info

Info	Please fill out this column
Ticket(s) this addresses	None
Primary OS tested on	Ubuntu 24.04
Robotic platform tested on	None
Does this PR contain AI generated software?	No

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Description of contribution in a few bullet points

• Fixes the dynamical parameter change of the parameter footprint_clearing_enabled via a ros2 callback
• The else if condition was a duplicate of the one before, so it was never executed. This change is fixing it.

Description of documentation updates required from your changes

Not needed.

Description of how this change was tested

ros2 param set /local_costmap/local_costmap obstacle_layer.footprint_clearing_enabled False or True to disable/enable it

Future work that may be required in bullet points

None

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

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This is an automatic backport of pull request #4885 done by [Mergify](https://mergify.com).

[mergify]

@mergify[bot], all pull requests must be targeted towards the main development branch.
Once merged into main, it is possible to backport to @jazzy, but it must be in main
to have these changes reflected into new distributions.