fix: handle HTTP query write errors

[immanuwell]

HTTP query can panic after a client stops reading a streamed response

Return the write error and stop the query instead

Repro:

1. Add the regression test
2. Run go test ./ -run Test_http_query_write_error_does_not_panic -count=1
3. On main it panics on a disconnected writer. This keeps it quiet

Tests: make test, make test-race

[joamaki]

Heh why did I use panic there :D. Thanks for the fix.