Add missing rmw_get_gid_for_client method

[github-actions[bot]]

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

Patch and project coverage have no change.

Comparison is base (c4a5111) 47.71% compared to head (eddad51) 47.71%.

:exclamation: Current head eddad51 differs from pull request most recent head 5f2d94c. Consider uploading reports for the commit 5f2d94c to get more accurate results

Additional details and impacted files

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