Make config file better.

[GMHDBJD]

Feature Request

Is your feature request related to a problem? Please describe:

In DM, configuration items can be divided into three categories:

1. Process configuration, such as addr, port, log level, etc
2. Upstream MySQL related configuration, such as MySQL connection information, source-id, etc
3. Data migration task configuration, such as task-related upstream and downstream information, block and allow list and other feature related configuration

Currently, the third type information needs to refer to the second type information (for example, the source-id needs to be specified in task.yaml).

Describe the feature you'd like:

• Minimize the reference relationship between configuration item categories
• Use Web UI to config easily
• More clear documentation instructions for easy and correct use
• Better checking mechanism to avoid mis-use

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

[lance6716]

perhaps we should rename add alias to these configurations items to let name indicate usage, for example:

mydumpers -> full-data-dump

loaders -> full-data-load

syncer -> incremental-data-sync

[csuzhangxc]

perhaps we should rename these configurations items to let name indicate usage, for example:

mydumpers -> full-data-dump

loaders -> full-data-load

syncer -> incremental-data-sync

syncer we are renaming it to binlog replication as we did in Grafana dashboard.

[GMHDBJD]

• support both task-name and task-file for some command. ctl: support using task-file when need task-name #854 *: support sourceID on operate-source stop #855
• change source config file format to yaml(same as task config file) *: change source config format to YAML #828
• add print-sample-config flag for source config source: add print-sample-config flag for operate-source #827
• check primary/unique key exists in precheck tidb-tools#376
• uniform handle for ansi-quotes and ANSI_QUOTES sql_mode in session for task config uniform handle for ansi-quotes and ANSI_QUOTES sql_mode in session for task config #878
• fix args config not working for dumpling dumpling: fix args config #875
• support --tables-list in extra-args
• support tls config for dumpling TLS support for dumpling in v2.0 #880