Automated g4 rollback of changelist 278905557.

*** Reason for rollback ***

Reverted curl version to check if kokoro builds correctly again

*** Original change description ***

Firebase cpp: Updated opensource curl version to match internal curl version

***

PiperOrigin-RevId: 280521763

Author: markchandler

cmake/external/curl.cmake

@@ -22,7 +22,7 @@ ExternalProject_Add(
   curl
 
   GIT_REPOSITORY https://github.com/curl/curl.git
-  GIT_TAG        curl-7_66_0
+  GIT_TAG        curl-7_58_0
 
   PREFIX ${PROJECT_BINARY_DIR}