Allow disabling error-level logging of bootstrap connectivity failures

[brandond]

Fixes:

• Constant bootstrap completed but connectivity has not been reached error spew on single-node cluster #1120

[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 6 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
pkg/routing/p2p.go	71.42%	5 Missing and 1 partial ⚠️

Flag	Coverage Δ
integration-containerd	20.80% <ø> (-0.26%)	⬇️
unit	55.79% <71.42%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
pkg/routing/p2p.go	59.52% <71.42%> (-0.68%)	⬇️

... and 1 file with indirect coverage changes

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[brandond]

cc @phillebaba - any chance of getting this looked at?

Should we wire this up to a CLI flag?

[phillebaba]

I am currently taking some time off from working on Spegel until the beginning on February, so that I can focus on work that will allow me to pay the bills. Until then I will not be active in issues or reviewing any PRs.