Clean up CodeGenerator by moving compilation-global data and logic to Context
#844
| Job | Run time |
|---|---|
| 5s | |
| 4m 12s | |
| 4m 44s | |
| 4s | |
| 5s | |
| 8m 43s | |
| 5s | |
| 36s | |
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| 19s | |
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| 6m 23s | |
| 4m 0s | |
| 8m 13s | |
| 1s | |
| 38m 35s |