Fix bug deprecation message retrieval #9204

Job	Run time
Build Ballerina Lang	8m 14s
Build Ballerina Distribution	48m 7s
Build Stdlib Level (10)	4m 12s
Build Stdlib Level (2)	15m 40s
Build Stdlib Level (3)	9m 11s
Build Stdlib Level (1)	5m 19s
Build Stdlib Level (4)	15m 30s
Build Stdlib Level (5)	7m 30s
Build Stdlib Level (6)	36m 4s
Build Stdlib Level (7)	20m 22s
Build Stdlib Level (8)	30m 37s
Build Stdlib Level (9)	1h 11m 52s
	4h 32m 38s

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