vrend: add meson option to treat gl errors as non-fatal

Treating all GL errors as fatal has lead to several unexpected
production breakages, where ignored errors were otherwise
non-disruptive.

For the short-term, we need an option to disable fatal error checking,
while figuring out a long-term plan for mitigating production breakages.

Signed-off-by: Ryan Neph <ryanneph@google.com>
Part-of: <!836>
17 jobs for !836 with disable-fatal-option in 16 minutes and 24 seconds (queued for 3 seconds)
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