refactor(set-change-password): [Auth/PM-17649] Move CompareInputs Validator (#14173)

This PR
- Moves the `compareInputs` validator to `libs/auth` (with some minor updates to the validator)
- Adds unit tests for `compareInputs`
- Removes the deprecated input validators from `InputsFieldMatch` along with the `inputs-field-match.validator.ts` file

libs/auth/src/angular/index.ts

@@ -77,3 +77,6 @@ export * from "./two-factor-auth";
 
 // device verification
 export * from "./new-device-verification/new-device-verification.component";
+
+// validators
+export * from "./validators/compare-inputs.validator";