Improve error handling of releases creation

[ehmicky]

When releases are created and an error is thrown, there is currently some error handling code:

https://github.com/getsentry/sentry-netlify-build-plugin/blob/91d932960f4e1c1c8ba4648cb837000f590b06a0/index.js#L84-95

However, that code did not handle the following two errors which happened in production:

Command failed: /opt/buildhome/.netlify-build-plugins/node_modules/@sentry/cli/sentry-cli releases new d6678d230f575c70ada04dcdada4ada2e9f7dd54
error: API request failed
  caused by: [7] Couldn't connect to server

Command failed: /opt/buildhome/.netlify-build-plugins/node_modules/@sentry/cli/sentry-cli releases new 0c0e7d6430d4ac5cea7f0af6abbed6279d817547
error: API request failed
  caused by: [6] Couldn't resolve host name

Command failed: /opt/buildhome/.netlify-build-plugins/node_modules/@sentry/cli/sentry-cli releases new 0.1.0
error: project not found

Command failed: /opt/buildhome/.netlify-build-plugins/node_modules/@sentry/cli/sentry-cli releases new 
error: Invalid value for '<VERSION>': Invalid release version. Slashes and certain whitespace characters are not permitted.

Command failed: /opt/buildhome/.netlify-build-plugins/node_modules/@sentry/cli/sentry-cli releases new 8c567894abb89c92dd6957d25369f55537fee4ed
error: request failed because API URL was incorrectly formatted
  caused by: bad sentry url: not on URL root (https://[email protected]/1199386)

Command failed: /opt/buildhome/.netlify-build-plugins/node_modules/@sentry/cli/sentry-cli releases deploys 1e3b19a91fa15d94fae858e0d8709bfee5c8b793 new -e deploy-preview
error: API request failed
  caused by: [35] SSL connect error

Are those errors due to a user issue or a problem with Sentry? In the first case, would it be possible to add some additional logic to report those as user errors? Thanks!