NOISSUE - Add FetchKbsToken RPC support, update protobuf generation, and include additional binaries in CI workflow. (#610)

* feat: add FetchKbsToken RPC support, update protobuf generation, and include additional binaries in CI workflow.

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

* chore: update protoc version and add GetKbsToken mock method with updated kbsHTTPGet signature

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

* test: inject mock attestation client into agentService for resource and KBS tests

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

* test: update key derivation in tests to use Concat KDF instead of HKDF

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

---------

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

pkg/attestation/azure/snp.go

@@ -134,6 +134,10 @@ func (a provider) AzureAttestationToken(tokenNonce []byte) ([]byte, error) {
 	return []byte(token), nil
 }
 
+func (a provider) KbsToken() ([]byte, error) {
+	return nil, fmt.Errorf("KbsToken not supported on Azure provider")
+}
+
 type verifier struct {
 	writer io.Writer
 }