privilege: fix compatibility of DBIsVisible (#14862)

[sre-bot]

cherry-pick #14862 to release-3.0

---

What problem does this PR solve?

User with trigger/references/execute global privileges can not see all database names and use them, but in MySQL is okay.

in TiDB:

mysql u1@127.0.0.1:(none)> show grants;
+-----------------------------------------------------+
| Grants for User                                     |
+-----------------------------------------------------+
| GRANT References,Execute,Trigger ON *.* TO 'u1'@'%' |
+-----------------------------------------------------+
1 row in set
Time: 0.014s
mysql u1@127.0.0.1:(none)> show databases;
+--------------------+
| Database           |
+--------------------+
| INFORMATION_SCHEMA |
+--------------------+
1 row in set

in MySQL:

mysql u1@127.0.0.1:test> show grants;
+----------------------------------+
| Grants for u1@%                  |
+----------------------------------+
| GRANT TRIGGER ON *.* TO 'u1'@'%' |
+----------------------------------+
1 row in set
Time: 0.014s
mysql u1@127.0.0.1:test> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test               |
+--------------------+
5 rows in set
Time: 0.014s
mysql u1@127.0.0.1:test> use test;
You are now connected to database "test" as user "u1"
Time: 0.001s
mysql u1@127.0.0.1:test> show tables;
+----------------+
| Tables_in_test |
+----------------+
| Ata            |
| atA            |
+----------------+
2 rows in set
Time: 0.014s
mysql u1@127.0.0.1:test>

mysql u1@127.0.0.1:test> show grants;
+----------------------------------+
| Grants for u1@%                  |
+----------------------------------+
| GRANT EXECUTE ON *.* TO 'u1'@'%' |
+----------------------------------+
1 row in set
Time: 0.015s
mysql u1@127.0.0.1:test> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test               |
+--------------------+
5 rows in set

What is changed and how it works?

add TriggerPriv, EcecutePriv, ReferencePriv into globalDBVisible

Check List

Tests

• Unit test

Code changes

• None

Side effects

• None

Related changes

• Need to cherry-pick to the release branch

Release note

[sre-bot]

/run-all-tests

[jackysp]

LGTM

[tiancaiamao]

LGTM

[zz-jason]

/merge

[sre-bot]

Your auto merge job has been accepted, waiting for 15365

[sre-bot]

/run-all-tests