Fix memory release on entities creation (backport #280)

[mergify]

This is an automatic backport of pull request #280 done by Mergify.

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[github-actions]

Static memory analysis

Default configuration

MTU: 512 B
Input buffer size: 2048 B
Input history: 4
Output buffer size: 2048 B
Output history: 4

Entity	Qty	Size per unit
Context	2	5616 B
Topic	8	56 B
Service	4	248 B
Client	4	248 B
Subscription	4	280 B
Publisher	4	288 B
Node	4	208 B
Static input buffer	8	2136 B
Init options	6	64 B
Wait sets	4	56 B
Guard Condition	4	64 B

TOTAL: 34500 B

[codecov-commenter]

Codecov Report

Base: 47.90% // Head: 47.82% // Decreases project coverage by -0.09% ⚠️

Coverage data is based on head (1a87a98) compared to base (a08c301).
Patch coverage: 42.30% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #281      +/-   ##
==========================================
- Coverage   47.90%   47.82%   -0.09%     
==========================================
  Files          45       45              
  Lines        1745     1744       -1     
  Branches      501      508       +7     
==========================================
- Hits          836      834       -2     
- Misses        678      679       +1     
  Partials      231      231              

Impacted Files	Coverage Δ
rmw_microxrcedds_c/src/rmw_node.c	39.25% <0.00%> (-3.18%)	⬇️
rmw_microxrcedds_c/src/rmw_microxrcedds_topic.c	43.33% <25.00%> (-0.22%)	⬇️
rmw_microxrcedds_c/src/rmw_publisher.c	48.09% <60.00%> (ø)
rmw_microxrcedds_c/src/rmw_subscription.c	52.51% <60.00%> (ø)
rmw_microxrcedds_c/src/rmw_client.c	46.55% <100.00%> (+1.17%)	⬆️
rmw_microxrcedds_c/src/rmw_service.c	45.68% <100.00%> (+0.68%)	⬆️

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