fix!: rename Hilla's endpointObjectMapper to prevent bean name clashes #7799

Job	Run time
Build Java and TypeScript for other tasks	2m 41s
Check style	1m 54s
Gradle tests (ubuntu-latest)	4m 0s
ITs (ubuntu-latest, group-1)	5m 51s
Test Java	3m 46s
Gradle tests (windows-latest)	7m 28s
ITs (ubuntu-latest, group-2)	4m 24s
Test TypeScript	2m 21s
ITs (ubuntu-latest, some)	4m 32s
Tests Summary	3s
	37m 0s

Provide feedback