[Minor] move static keyword to beginning of function declarations

[Minor] move static keyword to beginning of function declarations

In file included from ../src/libserver/logger/logger_file.c:23:
../src/libserver/logger/logger_private.h:106:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
  106 | const static struct rspamd_logger_funcs file_log_funcs = {
      | ^~~~~
../src/libserver/logger/logger_private.h:130:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
  130 | const static struct rspamd_logger_funcs syslog_log_funcs = {
      | ^~~~~
../src/libserver/logger/logger_private.h:154:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
  154 | const static struct rspamd_logger_funcs console_log_funcs = {
      | ^~~~~