fix(lambda): bump flatted from 3.3.1 to 3.4.2 in /lambdas (#5075) #6626

Job	Run time
Verify module (latest)	24s
Verify module (1.5.6)	33s
Verify examples (1.5.6, prebuilt)	32s
Verify examples (1.5.6, ephemeral)	34s
Verify examples (1.5.6, external-managed-ssm-secrets)	41s
Verify examples (1.5.6, termination-watcher)	39s
Verify examples (latest, termination-watcher)	19s
Verify examples (latest, external-managed-ssm-secrets)	23s
Verify examples (latest, prebuilt)	26s
Verify examples (1.5.6, multi-runner)	35s
Verify examples (latest, multi-runner)	29s
Verify examples (latest, default)	27s
Verify examples (latest, ephemeral)	27s
Verify examples (1.5.6, default)	45s
Verify modules (1.5.6, setup-iam-permissions)	26s
Verify modules (1.5.6, download-lambda)	25s
Verify modules (1.5.6, lambda)	26s
Verify modules (latest, ami-housekeeper)	24s
Verify modules (latest, termination-watcher)	20s
Verify modules (1.5.6, multi-runner)	27s
Verify modules (latest, multi-runner)	24s
Verify modules (1.5.6, webhook)	26s
Verify modules (1.5.6, ssm)	24s
Verify modules (1.5.6, termination-watcher)	21s
Verify modules (latest, setup-iam-permissions)	19s
Verify modules (1.5.6, runners)	20s
Verify modules (latest, lambda)	20s
Verify modules (1.5.6, runner-binaries-syncer)	20s
Verify modules (latest, runners)	24s
Verify modules (latest, download-lambda)	19s
Verify modules (latest, webhook)	17s
Verify modules (1.5.6, ami-housekeeper)	19s
Verify modules (latest, ssm)	20s
Verify modules (latest, runner-binaries-syncer)	21s
	14m 36s

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