src/goLanguageServer: enforce minimum version requirement even when checkForUpdates is off

[hyangah]

There are cases where the backwards compatibility is not feasible (e.g. #1300).
Even though we have a minimum version hard-coded, currently the version check logic is completely skipped if users configured to use checkForUpdates : off.

vscode-go/src/goLanguageServer.ts

Line 1013 in 7dac4c7

if (tool.name !== 'gopls' || cfg.checkForUpdates === 'off' || IsInCloudIDE) {

Either enforce that, or clearly communicate with users about the risk.

[gopherbot]

Change https://golang.org/cl/302832 mentions this issue: src/goLanguageServer: always check the version before crash report

[gopherbot]

Change https://golang.org/cl/303051 mentions this issue: [release] src/goLanguageServer: always check the version before crash report