Moves from OIDs to attestation type

[Ruteri]

No description provided.

[metachris]

For clarity, these headers will be sent:

X-Flashbots-Attestation-Type: azure-tdx
X-Flashbots-Measurement: {...}

Generally possible attestation type values:

cvm-reverse-proxy/internal/attestation/variant/variant.go

Lines 42 to 54 in 64cbe6b

	const (
	dummy = "dummy"
	awsNitroTPM = "aws-nitro-tpm"
	awsSEVSNP = "aws-sev-snp"
	gcpSEVES = "gcp-sev-es"
	gcpSEVSNP = "gcp-sev-snp"
	azureTDX = "azure-tdx"
	azureSEVSNP = "azure-sev-snp"
	azureTrustedLaunch = "azure-trustedlaunch"
	qemuVTPM = "qemu-vtpm"
	qemuTDX = "qemu-tdx"
	)