Consul validate misses typo in path to TLS certificates in configuration file that prevents start

[mekkim]

Overview of the Issue

consul validate returns valid if typo in path to TLS cert file location but consul will fail to start when it can't find the cert file

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Reproduction Steps

Steps to reproduce this issue, eg:

• Create a config file with the TLS stanza and the standard TLS cert paths to the .pem files.
• Insert a typo into one of the file paths
• Run consul validate -> It will return valid (assuming no other problems in the config file!)
• Attempt to start consul -> It will fail and with no useful error message at that!

Operating system and Environment details

consul 2.0.3+ent on RHEL 9.7 x86_64 VM on nutanix hypervisor