Fix build with -DENABLE_LIBRARIES=0 / -DENABLE_REPLXX=0

Replxx: When disabled via -DENABLE_LIBRARIES=0 or -DENABLE_REPLXX (the
latter was undocumented) the build broke because replxx symbols were
used since [0] in header LineReader.h. This header should in theory
stay clean of replxx but doesn't for efficiency reasons.

This change makes compilation of replxx mandatory. As replxx is quite
small, I guess this is okay. (The alternative is to litter the code
with ifdefs for non-replxx and a replxx paths.)

[0] https://github.com/ClickHouse/ClickHouse/pull/33201

base/base/CMakeLists.txt

@@ -17,15 +17,12 @@ set (SRCS
     sleep.cpp
     terminalColors.cpp
     errnoToString.cpp
+    ReplxxLineReader.cpp
     StringRef.cpp
     safeExit.cpp
     throwError.cpp
 )
 
-if (ENABLE_REPLXX)
-    list (APPEND SRCS ReplxxLineReader.cpp)
-endif ()
-
 if (USE_DEBUG_HELPERS)
     get_target_property(MAGIC_ENUM_INCLUDE_DIR ch_contrib::magic_enum INTERFACE_INCLUDE_DIRECTORIES)
     # CMake generator expression will do insane quoting when it encounters special character like quotes, spaces, etc.

contrib/replxx-cmake/CMakeLists.txt

@@ -1,10 +1,3 @@
-option (ENABLE_REPLXX "Enable replxx support" ${ENABLE_LIBRARIES})
-
-if (NOT ENABLE_REPLXX)
-    message (STATUS "Not using replxx")
-    return()
-endif()
-
 set (LIBRARY_DIR "${ClickHouse_SOURCE_DIR}/contrib/replxx")
 
 set(SRCS