Fuzz testing on all binary decoding for LLO

[samsondav]

• Fuzz testing on ReportCodecPremiumLegacy.Decode
• Fuzz on PluginScopedRetirementReportCache_CheckAttestedRetirementReport

Requires

Supports

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[jmank88]

Another angle that could be fuzzed is whether the decoded data re-encodes, and as the same bytes:

Suggested change

	codec.Decode(data) //nolint:errcheck // test that it doesn't panic, don't care about errors
	decoded, err := codec.Decode(data) //nolint:errcheck // test that it doesn't panic, don't care about errors
	if err != nil {
	reEncoded, err := codec.Encode(decoded)
	require.NoError(f, err)
	require.Equals(f, data, reEncoded)
	}