refactor(context): simplify "GetType()" functions (#4080) #1648

Job	Run time
lint	16s
ubuntu-latest @ Go 1.21	40s
ubuntu-latest @ Go 1.21 -tags nomsgpack	32s
ubuntu-latest @ Go 1.21 -tags "sonic avx"	58s
ubuntu-latest @ Go 1.21 -tags go_json	45s
ubuntu-latest @ Go 1.21 -race	14s
ubuntu-latest @ Go 1.22	33s
ubuntu-latest @ Go 1.22 -tags nomsgpack	28s
ubuntu-latest @ Go 1.22 -tags "sonic avx"	56s
ubuntu-latest @ Go 1.22 -tags go_json	42s
ubuntu-latest @ Go 1.22 -race	8s
macos-latest @ Go 1.21	52s
macos-latest @ Go 1.21 -tags nomsgpack	35s
macos-latest @ Go 1.21 -tags "sonic avx"	33s
macos-latest @ Go 1.21 -tags go_json	38s
macos-latest @ Go 1.21 -race	25s
macos-latest @ Go 1.22	42s
macos-latest @ Go 1.22 -tags nomsgpack	43s
macos-latest @ Go 1.22 -tags "sonic avx"	34s
macos-latest @ Go 1.22 -tags go_json	53s
macos-latest @ Go 1.22 -race	25s
	12m 32s

Provide feedback