docs: mark allowRuleToRunWithoutStrictNullChecksIKnowWhatIAmDoing options as deprecated (#9914)

Author: JoshuaKGoldberg

packages/eslint-plugin/docs/rules/no-unnecessary-condition.mdx

@@ -91,6 +91,10 @@ do {} while (true);
 
 ### `allowRuleToRunWithoutStrictNullChecksIKnowWhatIAmDoing`
 
+:::danger Deprecated
+This option will be removed in the next major version of typescript-eslint.
+:::
+
 If this is set to `false`, then the rule will error on every file whose `tsconfig.json` does _not_ have the `strictNullChecks` compiler option (or `strict`) set to `true`.
 
 Without `strictNullChecks`, TypeScript essentially erases `undefined` and `null` from the types. This means when this rule inspects the types from a variable, **it will not be able to tell that the variable might be `null` or `undefined`**, which essentially makes this rule useless.

packages/eslint-plugin/docs/rules/prefer-nullish-coalescing.mdx

@@ -174,7 +174,11 @@ Also, if you would like to ignore all primitives types, you can set `ignorePrimi
 
 ### `allowRuleToRunWithoutStrictNullChecksIKnowWhatIAmDoing`
 
-Unless this is set to `true`, the rule will error on every file whose `tsconfig.json` does _not_ have the `strictNullChecks` compiler option (or `strict`) set to `true`.
+:::danger Deprecated
+
+> This option will be removed in the next major version of typescript-eslint.
+> :::
+> Unless this is set to `true`, the rule will error on every file whose `tsconfig.json` does _not_ have the `strictNullChecks` compiler option (or `strict`) set to `true`.
 
 Without `strictNullChecks`, TypeScript essentially erases `undefined` and `null` from the types. This means when this rule inspects the types from a variable, **it will not be able to tell that the variable might be `null` or `undefined`**, which essentially makes this rule useless.
 

packages/eslint-plugin/docs/rules/strict-boolean-expressions.mdx

@@ -144,7 +144,11 @@ Set this to `true` at your own risk.
 
 ### `allowRuleToRunWithoutStrictNullChecksIKnowWhatIAmDoing`
 
-If this is set to `false`, then the rule will error on every file whose `tsconfig.json` does _not_ have the `strictNullChecks` compiler option (or `strict`) set to `true`.
+:::danger Deprecated
+
+> This option will be removed in the next major version of typescript-eslint.
+> :::
+> If this is set to `false`, then the rule will error on every file whose `tsconfig.json` does _not_ have the `strictNullChecks` compiler option (or `strict`) set to `true`.
 
 Without `strictNullChecks`, TypeScript essentially erases `undefined` and `null` from the types. This means when this rule inspects the types from a variable, **it will not be able to tell that the variable might be `null` or `undefined`**, which essentially makes this rule a lot less useful.