add exec_ctx to TlsCredential-related classes (#26031)

* add exec_ctx to tls credential related classes

src/core/lib/security/credentials/tls/grpc_tls_certificate_provider.cc

@@ -368,6 +368,7 @@ FileWatcherCertificateProvider::ReadIdentityKeyCertPairFromFiles(
 grpc_tls_certificate_provider* grpc_tls_certificate_provider_static_data_create(
     const char* root_certificate, grpc_tls_identity_pairs* pem_key_cert_pairs) {
   GPR_ASSERT(root_certificate != nullptr || pem_key_cert_pairs != nullptr);
+  grpc_core::ExecCtx exec_ctx;
   grpc_core::PemKeyCertPairList identity_pairs_core;
   if (pem_key_cert_pairs != nullptr) {
     identity_pairs_core = std::move(pem_key_cert_pairs->pem_key_cert_pairs);
@@ -385,6 +386,7 @@ grpc_tls_certificate_provider*
 grpc_tls_certificate_provider_file_watcher_create(
     const char* private_key_path, const char* identity_certificate_path,
     const char* root_cert_path, unsigned int refresh_interval_sec) {
+  grpc_core::ExecCtx exec_ctx;
   return new grpc_core::FileWatcherCertificateProvider(
       private_key_path == nullptr ? "" : private_key_path,
       identity_certificate_path == nullptr ? "" : identity_certificate_path,

src/core/lib/security/credentials/tls/grpc_tls_credentials_options.cc

@@ -87,6 +87,7 @@ void grpc_tls_server_authorization_check_config::Cancel(
 /** -- Wrapper APIs declared in grpc_security.h -- **/
 
 grpc_tls_credentials_options* grpc_tls_credentials_options_create() {
+  grpc_core::ExecCtx exec_ctx;
   return new grpc_tls_credentials_options();
 }
 
@@ -109,6 +110,7 @@ void grpc_tls_credentials_options_set_certificate_provider(
     grpc_tls_certificate_provider* provider) {
   GPR_ASSERT(options != nullptr);
   GPR_ASSERT(provider != nullptr);
+  grpc_core::ExecCtx exec_ctx;
   options->set_certificate_provider(
       provider->Ref(DEBUG_LOCATION, "set_certificate_provider"));
 }
@@ -142,6 +144,7 @@ void grpc_tls_credentials_options_set_server_authorization_check_config(
     grpc_tls_server_authorization_check_config* config) {
   GPR_ASSERT(options != nullptr);
   GPR_ASSERT(config != nullptr);
+  grpc_core::ExecCtx exec_ctx;
   options->set_server_authorization_check_config(config->Ref());
 }
 
@@ -159,6 +162,7 @@ grpc_tls_server_authorization_check_config_create(
             "check config.");
     return nullptr;
   }
+  grpc_core::ExecCtx exec_ctx;
   return new grpc_tls_server_authorization_check_config(
       config_user_data, schedule, cancel, destruct);
 }