Rename DocC SourceKit-LSP request to `textDocument/doccDocumentation` #429

Job	Run time
Test / Windows (5.9 - windows-2022)	11m 43s
Test / Linux (5.8 - jammy)	3m 49s
Test / Windows (6.0 - windows-2022)	12m 35s
Test / Linux (5.9 - jammy)	3m 59s
Test / Linux (5.10 - jammy)	3m 44s
Test / Linux (6.0 - jammy)	5m 1s
Soundness / API breakage check	0s
Soundness / Broken symlinks check	5s
Soundness / Documentation check	0s
Soundness / Format check	0s
Soundness / License headers check	0s
Soundness / Python lint check	5s
Soundness / Unacceptable language check	3s
Soundness / Shell check	36s
Soundness / YAML lint check	4s
	41m 44s

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