deps: update google http client dependencies to v1.44.2 #6960

Job	Run time
build(21) except self-service clients	11m 29s
build (11)	12m 40s
build (17)	12m 49s
build(8) except for gapic-generator-java	4m 20s
build(8) for gapic-generator-java	9m 51s
lint	30s
compatibility	1m 40s
showcase (11)	4m 1s
showcase (17)	3m 57s
dependency_analyzer_unit_test	26s
gapic-generator-java-bom	1m 50s
showcase-clirr	2m 51s
showcase-native	8m 8s
unmanaged_dependency_check	5m 2s
	1h 19m 34s

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