etcd-cpp-apiv3: Fix build with gprc 2.66+

GPR_ASSERT is removed from latest gprc

Fixes
   | /home/pokybuild/yocto-worker/meta-oe/build/build/tmp-glibc/work/core2-64-poky-linux/etcd-cpp-apiv3/0.15.4/git/src/v3/Action.cpp: In member function 'void etcdv3::Action::waitForResponse()':
   | /home/pokybuild/yocto-worker/meta-oe/build/build/tmp-glibc/work/core2-64-poky-linux/etcd-cpp-apiv3/0.15.4/git/src/v3/Action.cpp:101:5: error: 'GPR_ASSERT' was not declared in this scope
   |   101 |     GPR_ASSERT(got_tag == (void*) this);
   |       |     ^~~~~~~~~~

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-extended/etcd/etcd-cpp-apiv3/0001-Replacing-GPR_ASSERT-with-c-assert.patch

@@ -0,0 +1,33 @@
+From aeb34f58782fb6d06aea4f5cbeccb23a0224466e Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 4 Sep 2024 14:54:42 -0700
+Subject: [PATCH] Replacing GPR_ASSERT with c assert
+
+Latest GRPC >= 2.66 has dropped GRPC_ASSERT macro [1]
+
+[1] https://github.com/grpc/grpc/commit/0e23c2259da967a037e839e80cafd62bc6f9f68e
+
+Upstream-Status: Submitted [https://github.com/etcd-cpp-apiv3/etcd-cpp-apiv3/pull/281]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ src/v3/Action.cpp | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+--- a/src/v3/Action.cpp
++++ b/src/v3/Action.cpp
+@@ -2,6 +2,15 @@
+ #include <grpc/support/log.h>
+ #include <grpcpp/support/status.h>
+ #include "etcd/v3/action_constants.hpp"
++#include <cstdlib>
++
++#ifndef GPR_ASSERT
++#define GPR_ASSERT(x)                                             \
++  if (!(x)) {                                                     \
++    fprintf(stderr, "%s:%d assert failed\n", __FILE__, __LINE__); \
++    abort();                                                      \
++}
++#endif
+ 
+ etcdv3::Action::Action(etcdv3::ActionParameters const& params) {
+   parameters = params;

meta-oe/recipes-extended/etcd/etcd-cpp-apiv3_0.15.4.bb

@@ -7,6 +7,7 @@ LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=eae7da6a2cd1788a5cf8a9f838cf6450"
 SRC_URI = " \
     git://github.com/etcd-cpp-apiv3/etcd-cpp-apiv3.git;branch=master;protocol=https \
     file://0001-include-stdint.h-for-int64_t-types.patch \
+    file://0001-Replacing-GPR_ASSERT-with-c-assert.patch \
 "
 
 SRCREV = "ba6216385fc332b23d95683966824c2b86c2474e"