[v10.2.x] Plugins: Keep working when there is no internet access #78092
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Backport ea12eec from #77978
Related issues: #77905, https://github.com/grafana/support-escalations/issues/8305
What is the problem?
The "Add new connection" and "Plugins catalog" pages are not loading in case there is no internet access.
Why?
Although releasing #75272 made it possible to load these pages seamlessly in case the connection to GCOM times out, it didn't cater for any other network errors properly when fetching GCOM.
Solution
This PR is fixing the issue by not blocking the main UI flow in case the remote plugins are not available.
Testing
Tested the following flows manually: