chore(package_xml): added autoware_ prefix to gnss_poser

[TaikiYamada4]

Description

Following the movement of adding autoware_ prefix to package names, this PR adds autoware prefix to gnss_poser.

Related links

Since this PR strongly relates to sensor launching systems, this PR must be merged together with the following PRs.

• chore(gnss_poser): add autoware prefix to gnss_poser autowarefoundation/autoware.universe#8323
• chore(gnss_launch): added autoware_ prefix to gnss_poser autowarefoundation/sample_sensor_kit_launch#100
• chore(gnss_launch): added autoware prefix to gnss_poser aip_launcher#283
• chore(package_xml): added autoware_ prefix to gnss_poser autowarefoundation/awsim_labs_sensor_kit_launch#4

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[shmpwk]

LGTM

[SakodaShintaro]

@shmpwk Since the PR was merged on autoware.universe, can you also merge this one?