shutdown services in destructor of `ClearCostmapService`

[GoesM]

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Basic Info

Info	Please fill out this column
Ticket(s) this addresses	#4489
Primary OS tested on	Ubuntu
Robotic platform tested on	gazebo simulation
Does this PR contain AI generated software?	(No)

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Description of contribution in a few bullet points

To avoid UAF bug mentioned in #4489

Description of documentation updates required from your changes

shutdown services in destructor of ClearCostmapService

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Future work that may be required in bullet points

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:

Files	Coverage Δ
nav2_costmap_2d/src/clear_costmap_service.cpp	28.00% <100.00%> (+1.46%)	:arrow_up: