x/tools/gopls: release version v0.11.0

[findleyr]

This issue tracks progress toward releasing gopls@v0.11.0

• create gopls-release-branch.0.11
• update codereview.cfg
• update release CI for the new branch
• update hard-coded version
• update go.mod/go.sum (remove x/tools replace, update x/tools version)
• tag gopls/v0.11.0-pre.1
• update Github milestone
• write release notes
• smoke test features
• tag gopls/v0.11.0
• update dependencies in master for the next release

[gopherbot]

Change https://go.dev/cl/455163 mentions this issue: all: update codereview.cfg for gopls-release-branch.0.11

[gopherbot]

Change https://go.dev/cl/455164 mentions this issue: internal/lsp/debug: update hard-coded version for v0.11.0

[gopherbot]

Change https://go.dev/cl/455165 mentions this issue: gopls: update go.mod for v0.11.0

[hyangah]

v0.11.0-pre.1 is available for testing.

[gopherbot]

Change https://go.dev/cl/455168 mentions this issue: package.json: sync gopls settings (gopls@v0.11.0-pre.1)

[gopherbot]

Change https://go.dev/cl/456757 mentions this issue: gopls: update go.mod for v0.11.0-pre.2