Add HandlerMessageBody to SentryException #1376

Job	Run time
Tests without optional packages (7.2, lowest, 4.4.*)	22s
Tests (7.2, 4.4.*, highest)	34s
Tests without optional packages (7.4, highest)	24s
Tests (7.2, 5.*, highest)	23s
Tests without optional packages (8.0, lowest, 4.4.*)	31s
Tests (7.3, 4.4.*, highest)	31s
Tests without optional packages (8.3, highest)	33s
Tests (7.3, 5.*, highest)	24s
Tests (7.4, 4.4.*, highest)	33s
Tests (7.4, 5.*, highest)	24s
Tests (8.0, 4.4.*, highest)	26s
Tests (8.0, 5.*, highest)	32s
Tests (8.0, 6.*, highest)	33s
Tests (8.1, 4.4.*, highest)	28s
Tests (8.1, 5.*, highest)	23s
Tests (8.1, 6.*, highest)	25s
Tests (8.2, 4.4.*, highest)	36s
Tests (8.2, 5.*, highest)	24s
Tests (8.2, 6.*, highest)	25s
Tests (8.2, 7.*, highest)	34s
Tests (8.3, 4.4.*, highest)	31s
Tests (8.3, 5.*, highest)	34s
Tests (8.3, 6.*, highest)	34s
Tests (8.3, 7.*, highest)	24s
Tests (7.2, 4.4.*, lowest)	33s
Tests (7.2, 5.*, lowest)	44s
Tests (8.0, 6.*, lowest)	37s
Tests (8.2, 7.*, lowest)	28s
	13m 50s

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