feat: initial integration with `FullstoryInjector` #24

Job	Run time
test / matrix-prep-os	1s
test / matrix-prep-bazelversion	3s
test / test (ubuntu-latest, 7.2.1, ., true)	21s
test / test (ubuntu-latest, 7.2.1, e2e/smoke, true)	14s
test / test (ubuntu-latest, 7.2.1, e2e/smoke, false)	20s
conclusion	3s
	1m 2s

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