Bump drush/drush from 12.4.2 to 12.4.3 #1614

Job	Run time
build (STATIC_CODE_ANALYSIS, 8.1, FALSE, ^4)	30s
build (INTEGRATED_TEST_ON_OLDEST_SUPPORTED, 8.1, FALSE, ^4)	32s
build (INTEGRATED_TEST_ON_PREVIOUS_MINOR, 8.1, FALSE, ^4)	2m 42s
build (ISOLATED_TEST_ON_CURRENT, 8.1, FALSE, ^4)	1m 56s
build (INTEGRATED_TEST_ON_CURRENT, 8.1, FALSE, ^4)	2m 44s
build (ISOLATED_TEST_ON_CURRENT_DEV, 8.1, FALSE, ^4)	2m 26s
build (INTEGRATED_TEST_ON_CURRENT_DEV, 8.1, FALSE, ^4)	2m 39s
build (STRICT_DEPRECATED_CODE_SCAN, 8.1, FALSE, ^4)	21s
build (ISOLATED_TEST_ON_NEXT_MINOR, 8.1, FALSE, ^4)	2m 12s
build (DEPRECATED_CODE_SCAN_W_CONTRIB, 8.1, FALSE, ^4)	1m 3s
build (INTEGRATED_TEST_ON_NEXT_MINOR_DEV, 8.1, FALSE, ^4)	3m 20s
build (ISOLATED_TEST_ON_NEXT_MINOR_DEV, 8.1, FALSE, ^4)	2m 3s
build (LOOSE_DEPRECATED_CODE_SCAN, 8.1, FALSE, ^4)	1m 6s
build (INTEGRATED_TEST_ON_LATEST_LTS, 8.2, FALSE)	21s
build (ISOLATED_TEST_ON_CURRENT, 8.1, TRUE)	1m 58s
build (ISOLATED_TEST_ON_CURRENT, 8.2)	1m 48s
all-successful	3s
	27m 44s

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