Nonblocking sequence bt control node

[alexanderjyuen]

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Basic Info

Info	Please fill out this column
Ticket(s) this addresses	N/A
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

• Added new behavior tree control node that allows for ticking through of all children nodes if they were in SUCCESS or RUNNING states. This is enable a sequence to not be blocked by a single child in the running state
• Unit testing for the above control node

Description of documentation updates required from your changes

• Will need to add documentation to https://docs.nav2.org/behavior_trees/overview/nav2_specific_nodes.html, as a custom Nav2 Control Node
• Will need to add to migration guide

Description of how this change was tested

• Included unit testing
• Tested in Gazebo with ComputeAndTrackRoute BT Action Node, along with FollowPath. Since ComputeAndTrackRoute stays in the RUNNING state until route completion, the NonblockingSequence had to be used to get to the FollowPath BT Node while the route was being tracked

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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
• Should this be backported to current distributions? If so, tag with backport-*.

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...vior_tree/plugins/control/nonblocking_sequence.cpp	92.00%	2 Missing ⚠️

Files with missing lines	Coverage Δ
...vior_tree/plugins/control/nonblocking_sequence.hpp	100.00% <100.00%> (ø)
...vior_tree/plugins/control/nonblocking_sequence.cpp	92.00% <92.00%> (ø)

... and 3 files with indirect coverage changes

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