[PM-6819] Credential generator MV3 integration (#8998)

* replace `PasswordGeneratorService` with `legacyPasswordGenerationServiceFactory`
* replace `UsernameGeneratorService` with `legacyUsernameGenerationServiceFactory`
* migrate generator options and history
* apply policy immediately once available
* suppress duplicate policy emissions
* run password generation response code in `ngZone`

libs/common/src/tools/generator/username/subaddress-generator-strategy.ts

@@ -14,8 +14,6 @@ import {
   SubaddressGenerationOptions,
 } from "./subaddress-generator-options";
 
-const ONE_MINUTE = 60 * 1000;
-
 /** Strategy for creating an email subaddress
  *  @remarks The subaddress is the part following the `+`.
  *  For example, if the email address is `jd+xyz@domain.io`,
@@ -49,11 +47,6 @@ export class SubaddressGeneratorStrategy
     return PolicyType.PasswordGenerator;
   }
 
-  /** {@link GeneratorStrategy.cache_ms} */
-  get cache_ms() {
-    return ONE_MINUTE;
-  }
-
   /** {@link GeneratorStrategy.toEvaluator} */
   toEvaluator() {
     return pipe(map((_) => new DefaultPolicyEvaluator<SubaddressGenerationOptions>()));