gpu: elf: using reserve() for optimize inserts in for loop

From #21611

Core/ELF/ParamSFO.cpp

@@ -96,6 +96,7 @@ const u8 *ParamSFOData::GetValueData(std::string_view key, unsigned int *size) c
 
 std::vector<std::string> ParamSFOData::GetKeys() const {
 	std::vector<std::string> result;
+	result.reserve(values.size());
 	for (const auto &pair : values) {
 		result.push_back(pair.first);
 	}

GPU/Common/FramebufferManagerCommon.cpp

@@ -3381,6 +3381,7 @@ void FramebufferManagerCommon::RebindFramebuffer(const char *tag) {
 
 std::vector<const VirtualFramebuffer *> FramebufferManagerCommon::GetFramebufferList() const {
 	std::vector<const VirtualFramebuffer *> list;
+	list.reserve(vfbs_.size());
 	for (auto vfb : vfbs_) {
 		list.push_back(vfb);
 	}

GPU/GPUCommon.cpp

@@ -1595,6 +1595,7 @@ int GPUCommon::GetCurrentPrimCount() {
 
 std::vector<DisplayList> GPUCommon::ActiveDisplayLists() {
 	std::vector<DisplayList> result;
+	result.reserve(dlQueue.size());
 
 	for (int it : dlQueue) {
 		result.push_back(dls[it]);