cli: enable JSON output for `constellation verify` on Azure TDX

[daniel-weisse]

Context

Our CI parses the JSON output of constellation verify in order to upload the latest CC claims to Constellation's CDN. For now, this was only enabled for SEV-SNP attestation variants.

Proposed change(s)

• Enabled JSON output for Azure TDX
  • The TDX library we use also handles JSON marshalling of the quote, so I didn't implement any extra methods, unlike we did for SNP. This means we won't have pretty formatted text output for TDX variants, but this can always be added at a later date since it doesn't have high priority: AB#4266
• Simplify the constellation verify code a bit by removing the formatter factory

Additional info

• AB#3798

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Coverage report

Package	Old	New	Trend
cli/internal/cmd	41.00%	40.90%	:arrow_lower_right:
internal/attestation/azure/tdx	8.80%	8.80%	:construction:
internal/verify	8.00%	8.00%	:construction: