Add paramater to avoid Full Table Scan

## Feature Request

**Is your feature request related to a problem? Please describe:**
Per TiDB architecture, the database is distributed in different TiKV.
If a client runs a table scan by mistake it can affect the entire database performance and increase disk activity on all tikv.

**Describe the feature you'd like:**
Add an option on tidb like 'notablescan' that would fail a query that use full table scan on non default databases (mysql, information_schema)

**Describe alternatives you've considered:**
No workaround available for this feature

**Teachability, Documentation, Adoption, Migration Strategy:**
If accepted, documentation should be updated and the option should be disabled by default.