feat: hide credentials from show create source/table

[fuyufjh]

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

Hide credentials (passwords, secret keys, etc.) from the results of show create source/table. Otherwise, the plain-text password would be a terrible security issue for users.

Describe the solution you'd like

No response

Describe alternatives you've considered

Furthermore, we should encrypt the stored credentials as well, but that's another issue.

Additional context

No response

[BugenZhao]

Seems duplicated with #14115. There's a work in progress for this issue: #14760

[fuyufjh]

Duplicated #14115