[httpc] Do not read OS cacerts if verify_none

[maennchen]

Describe the bug

When suplying {ssl, [{verify, verify_none}]} to http, it still calls public_key:cacerts/0 internally. If there are no OS cacerts present on the machine, httpc will crash even though no certs were actually required.

To Reproduce

inets:start(),
ssl:start(),
Response = httpc:request(get, {\"https://google.com\", []}, [{ssl,[{verify, verify_none}]}], []),
erlang:display(Response).

** exception error: no match of right hand side value {error,enoent}
     in function  pubkey_os_cacerts:get/0 (pubkey_os_cacerts.erl, line 38)
     in call from httpc:ssl_verify_host_options/1 (httpc.erl, line 476)
     in call from httpc:http_options_default/0 (httpc.erl, line 1012)
     in call from httpc:http_options/1 (httpc.erl, line 927)
     in call from httpc:handle_request/9 (httpc.erl, line 771)

Expected behavior

No Error

Affected versions

>= 26.0

Additional context

• Follow up of [public_key] Dedicated error on missing cacerts file #7295 (comment)