feat: support `env-mapping` option #72

Job	Run time
checks	12s
audit	5s
test-cache-storage (true)	31s
test-declare-inputs	29s
test-cache-storage (false)	31s
test-defaults	18s
test-env-mapping	23s
test-formats (FAT, true)	28s
test-large-size (Fixed, true)	44s
test-formats (FAT, false)	29s
test-legacy-runners	11s
test-large-size (Fixed, false)	50s
test-mount-path (true, ReFS)	29s
test-formats (FAT32, true)	44s
test-large-size (Dynamic, true)	29s
test-mount-path (true, NTFS)	23s
test-formats (FAT32, false)	43s
test-large-size (Dynamic, false)	30s
test-mount-path (false, ReFS)	25s
test-paths-with-spaces (true)	29s
test-formats (exFAT, true)	33s
test-mount-path (false, NTFS)	21s
test-paths-with-spaces (false)	27s
test-unsupported-os	3s
test-workspace-copy-edge-cases (true, true)	21s
test-workspace-copy (true, true)	52s
test-workspace-copy-edge-cases (true, false)	22s
test-formats (exFAT, false)	24s
test-workspace-copy (false, true)	18s
test-workspace-copy-edge-cases (false, true)	25s
test-formats (NTFS, true)	35s
test-workspace-copy-edge-cases (false, false)	21s
test-formats (NTFS, false)	44s
test-formats (ReFS, true)	20s
test-formats (ReFS, false)	44s
test-cache-retrieval (true)	20s
test-cache-retrieval (false)	22s
	16m 55s

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