x/tools/gopls: release version v0.17.0

[gopherbot]

This issue tracks progress toward releasing gopls@v0.17.0

• create or update gopls-release-branch.0.17
• update go.mod/go.sum (remove x/tools replace, update x/tools version)
• tag gopls/v0.17.0-pre.1
• update Github milestone
• write release notes
• smoke test features
• tag gopls/v0.17.0
• (if vX.Y.0 release): update dependencies in master for the next release

[gopherbot]

Change https://go.dev/cl/626656 mentions this issue: all: update codereview.cfg for gopls-release-branch.0.17

[gopherbot]

Change https://go.dev/cl/626657 mentions this issue: gopls: update go.mod for v0.17.0-pre.1

[gopherbot]

Change https://go.dev/cl/627995 mentions this issue: all: merge master (5b5d57c) into gopls-release-branch.0.17

[gopherbot]

Change https://go.dev/cl/628035 mentions this issue: gopls: update go.mod for v0.17.0-pre.2

[gopherbot]

Change https://go.dev/cl/631676 mentions this issue: all: merge master (68e4702) into gopls-release-branch.0.17

[gopherbot]

Change https://go.dev/cl/631857 mentions this issue: gopls: update go.mod for v0.17.0-pre.3