Do not use deprecated log config options by default (#26592)

Simplify the log config

* Remove unnecessary `ROUTER` config, it defaults to the `MODE`.
* `XORM` config was deprecated

docker/root/etc/templates/app.ini

@@ -46,7 +46,6 @@ PATH = /data/gitea/attachments
 [log]
 MODE = console
 LEVEL = info
-ROUTER = console
 ROOT_PATH = /data/gitea/log
 
 [security]

tests/mssql.ini.tmpl

@@ -86,9 +86,8 @@ PROVIDER_CONFIG = tests/{{TEST_TYPE}}/gitea-{{TEST_TYPE}}-mssql/data/sessions
 [log]
 MODE                 = {{TEST_LOGGER}}
 ROOT_PATH            = {{REPO_TEST_DIR}}mssql-log
-ROUTER               = ,
-XORM                 = file
 ENABLE_SSH_LOG       = true
+logger.xorm.MODE     = file
 
 [log.test]
 LEVEL                = Info

tests/mysql.ini.tmpl

@@ -84,9 +84,8 @@ PROVIDER_CONFIG = tests/{{TEST_TYPE}}/gitea-{{TEST_TYPE}}-mysql/data/sessions
 [log]
 MODE                 = {{TEST_LOGGER}}
 ROOT_PATH            = {{REPO_TEST_DIR}}mysql-log
-ROUTER               = ,
-XORM                 = file
 ENABLE_SSH_LOG       = true
+logger.xorm.MODE     = file
 
 [log.test]
 LEVEL                = Info

tests/mysql8.ini.tmpl

@@ -83,9 +83,8 @@ PROVIDER_CONFIG = tests/{{TEST_TYPE}}/gitea-{{TEST_TYPE}}-mysql8/data/sessions
 [log]
 MODE                 = {{TEST_LOGGER}}
 ROOT_PATH            = {{REPO_TEST_DIR}}mysql8-log
-ROUTER               = ,
-XORM                 = file
 ENABLE_SSH_LOG       = true
+logger.xorm.MODE     = file
 
 [log.test]
 LEVEL                = Info

tests/pgsql.ini.tmpl

@@ -87,9 +87,8 @@ PROVIDER_CONFIG = tests/{{TEST_TYPE}}/gitea-{{TEST_TYPE}}-pgsql/data/sessions
 [log]
 MODE                 = {{TEST_LOGGER}}
 ROOT_PATH            = {{REPO_TEST_DIR}}pgsql-log
-ROUTER               = ,
-XORM                 = file
 ENABLE_SSH_LOG       = true
+logger.xorm.MODE     = file
 
 [log.test]
 LEVEL                = Info

tests/sqlite.ini.tmpl

@@ -82,9 +82,8 @@ PROVIDER_CONFIG = tests/{{TEST_TYPE}}/gitea-{{TEST_TYPE}}-sqlite/data/sessions
 [log]
 MODE                 = {{TEST_LOGGER}}
 ROOT_PATH            = {{REPO_TEST_DIR}}sqlite-log
-ROUTER               = ,
-XORM                 = file
 ENABLE_SSH_LOG       = true
+logger.xorm.MODE     = file
 
 [log.test]
 LEVEL                = Info