Enable attachment of binary files as charm resources #1243

Job	Run time
Validate (3.10)	29s
Build test (3.10)	23s
Unit tests (3.8)	27s
Unit tests (3.9)	28s
Unit tests (3.10)	28s
Unit tests (3.11)	26s
Unit tests (3.12)	32s
Unit tests (3.13)	31s
Integration (3.10, 3.1/stable)	41m 32s
Quarantined Integration Tests (3.10, 3.1/stable)	42m 5s
Integration (3.10, 3.3/stable)	1h 0m 21s
Quarantined Integration Tests (3.10, 3.3/stable)	54m 23s
Integration (3.10, 3.4/stable)	55m 25s
Quarantined Integration Tests (3.10, 3.4/stable)	1h 2m 45s
Integration (3.10, 3.5/stable)	42m 43s
Quarantined Integration Tests (3.10, 3.5/stable)	1h 4m 4s
Integration (3.10, 3.6/candidate)	54m 2s
	8h 1m 4s

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