Both verbs render through arg_json_format_flags but --json= was rejected for
them until the previous commit, and nothing in TEST-65-ANALYZE exercised it.
Add coverage in line with the other JSON-capable verbs.
identify-tpm2 is only invoked when has-tpm2 reports full support, as it
fails with EOPNOTSUPP when built without TPM2 support.
(cherry picked from commit 46a91a1867)