Remove `js-yaml` from `@RocketSoftware/eureka-js-client`

[ChongZhou-Broadcom]

@RocketSoftware/eureka-js-client 4.5.9 is used in zlux-server-framework, which introduced a transitive dependency "js-yaml@3.14.1":

*[zhou/upgrade-js-yaml][~/Work/Zowe/zowe/zlux-server-framework]$ npm list js-yaml
zlux-server-framework@0.0.0-zlux.version.replacement /Users/cz667581broadcom.com/Work/Zowe/zowe/zlux-server-framework
├─┬ @rocketsoftware/eureka-js-client@4.5.9
│ └── js-yaml@3.14.1
├─┬ mocha@11.2.2
│ └── js-yaml@4.1.1
└─┬ swagger-parser@10.0.3
  └─┬ @apidevtools/swagger-parser@10.0.3
    └─┬ @apidevtools/json-schema-ref-parser@9.1.2
      └── js-yaml@4.1.1

However, Blackduck scan showed that "js-yaml@3.14.1" has high security issue and the recommended version is 4.1.1.

@1000TurquoisePogs checked the code and believes that js-yaml is not actually used when @RocketSoftware/eureka-js-client 4.5.9 is used in Zowe, so we may remove this vulnerable dependency by removing the code from eureka-js-client that calls js-yaml.

(There is code that calls js-yaml to load the eureka's yaml configuration, but Zowe does not actually use eureka configuration file)