fix(linter/eslint/no-control-regex): refine help message text (#25996)

`eslint(no-control-regex)` correctly flags this regex
```ts
const fnKeyRe = /^(?:\x1b+)(O|N|\[|\[\[)(?:(\d+)(?:;(\d+))?([~^$])|(?:1;)?(\d+)?([a-zA-Z]))/
```

`'U+001B' is a control character.` and shows in help text, `help: Avoid
matching control characters in regular expressions. If intentional,
consider using a Unicode escape instead.`
but the help text is misleading, all forms of unicode escapes are also
flagged.

```ts
const a = /\x1b/;
const b = /\u001b/;
const c = /\u{1b}/u;
const d = /\u{001b}/u;
```
This behaviour is consistent with upstream eslint rule, just the help
text is misleading, so I have changed the help text to say to disable
this rule when its intentional