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/vtpm/vtpm.go

@@ -120,6 +120,10 @@ func (v provider) AzureAttestationToken(tokenNonce []byte) ([]byte, error) {
 	return nil, errors.New("Azure attestation token is not supported")
 }
 
+func (v provider) KbsToken() ([]byte, error) {
+	return nil, errors.New("KbsToken is not supported on vTPM provider")
+}
+
 type verifier struct {
 	writer io.Writer
 }