Backport of Add a flag for enabling debug logs to the connect envoy command into release/1.14.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #15988 to be assessed for backporting due to the inclusion of the label type/docs-cherrypick.

WARNING automatic cherry-pick of commits failed. Commits will require human attention.

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The below text is copied from the body of the original PR.

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This PR adds a flag, -enable-config-gen-logging, to the connect envoy command to display some log messages when generating the bootstrap config. It can be hard to troubleshoot slowness that happens during the multiple api requests during this command due to the current lack of logs, so this flag enables outputting some messages (on stderr) to help with that.

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Overview of commits

• bb528d2 - 9f79567 - 33870c1 - d73e20f - 63da1d6 - 49ef1c9

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[github-team-consul-core-pr-approver]

Auto approved Consul Bot automated PR