x/telemetry/config: temporarily allow gopls `devel` versions to upload telemetry data

[hyangah]

Gopls in the dev branch is collecting telemetry data currently, but since the upload config doesn't include counters from dev versions of gopls, the collected counters are never being uploaded. For testing, include devel version in the config during the dev cycle.

Alternative #1: we can have a separate version of config used for development and staging, and include devel there.
Alternative #2: tag gopls.

cc @golang/tools-team @jamalc

[gopherbot]

Change https://go.dev/cl/523699 mentions this issue: config: temporarily add gopls@devel to allowed program versions

[gopherbot]

Change https://go.dev/cl/534476 mentions this issue: config: temporarily allow 'devel' go version

[gopherbot]

Change https://go.dev/cl/534855 mentions this issue: config: temporarily allow 'devel' go version

[findleyr]

This is done. Let's use this issue to track reverting this change now that the gopls prerelease is out. Blocked by #63619

[findleyr]

We also need to make this change (temporarily) for toolchain programs.

[gopherbot]

Change https://go.dev/cl/594455 mentions this issue: internal/configgen: remove 'devel' version telemery