executor: fix user without process privilege can access cluster's systemInfo, Load, Hardware

[AilinKid]

Signed-off-by: ailinkid 314806019@qq.com

What problem does this PR solve?

Issue Number: close #26121, #26123, #26126

What is changed and how it works?

*: What's Changed: executor: fix user without process privilege can access cluster's systemInfo, Load, Hardware

Check List

Tests

• Unit test
• Integration test

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

• executor: fix user without process privilege can access cluster's systemInfo, Load, Hardware

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[mjonss]

I did something similar in #26220 please take a look which of the similar patches we should use 😄
Otherwise LGTM

[djshow832]

Test (at least manually) that users with process privilege can access those tables.

[AilinKid]

Duplicated with #26220, we will use it.

[AilinKid]

I found these tests can be suppliments to #26220, so after it merged, I will merge these tests.