Avoid creating unwanted virtual threads #8940

Job	Run time
Build Ballerina Lang	8m 18s
Build Ballerina Lang	8m 18s
Build Ballerina Lang	8m 18s
Build Ballerina Lang	8m 18s
Build Stdlib Level (1)	4m 31s
Build Stdlib Level (1)	4m 31s
Build Stdlib Level (1)	4m 31s
Build Stdlib Level (1)	4m 31s
Build Stdlib Level (10)	12m 2s
Build Stdlib Level (10)	12m 2s
Build Stdlib Level (10)	12m 2s
Build Stdlib Level (10)	12m 2s
Build Ballerina Distribution	1h 4m 36s
Build Ballerina Distribution	1h 4m 36s
Build Ballerina Distribution	1h 4m 36s
Build Ballerina Distribution	1h 4m 36s
Build Stdlib Level (2)	14m 8s
Build Stdlib Level (2)	14m 8s
Build Stdlib Level (2)	14m 8s
Build Stdlib Level (2)	14m 8s
Build Stdlib Level (3)	4m 55s
Build Stdlib Level (3)	4m 55s
Build Stdlib Level (3)	9m 22s
Build Stdlib Level (3)	9m 22s
Build Stdlib Level (4)	15m 48s
Build Stdlib Level (4)	15m 48s
Build Stdlib Level (4)	15m 48s
Build Stdlib Level (4)	15m 48s
Build Stdlib Level (5)	43m 19s
Build Stdlib Level (5)	43m 19s
Build Stdlib Level (5)	43m 19s
Build Stdlib Level (5)	43m 19s
Build Stdlib Level (6)	26m 38s
Build Stdlib Level (6)	26m 38s
Build Stdlib Level (6)	26m 38s
Build Stdlib Level (6)	26m 38s
Build Stdlib Level (7)	1h 18m 16s
Build Stdlib Level (7)	33m 11s
Build Stdlib Level (7)	33m 11s
Build Stdlib Level (7)	33m 11s
Build Stdlib Level (8)	1h 18m 16s
Build Stdlib Level (8)	1h 18m 16s
Build Stdlib Level (8)	1h 18m 16s
Build Stdlib Level (8)	1h 17m 18s
Build Stdlib Level (9)	4m 21s
Build Stdlib Level (9)	4m 21s
Build Stdlib Level (9)	4m 21s
Build Stdlib Level (9)	4m 21s
	21h 33m 13s

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