[oidc] user display names are all default when use google openid connect

[krin-wang]

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• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Describe the bug
oidc PreferredUsername is null when use google openid connect. I'd suggest fallback to FullName, when PreferredUsername is empty.

To Reproduce
Steps to reproduce the behavior:

1. use google openid connect as oidc provider.
2. login and check user display name
3. all display names are default

Expected behavior
I'd like there is a valid user display name.

Screenshots

[krin-wang]

Based on #3795, we're using PreferredUsername as display name. Could we fallback to FullName when PreferredUsername is empty?

I did a few changes in local and tested.

apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/spi/oidc/OidcAuthenticationSuccessEventListener.java

     newUserInfo.setName(oidcUser.getPreferredUsername());
+    if (!StringUtils.hasText(newUserInfo.getName())) {
+      newUserInfo.setName(oidcUser.getFullName());
+    }
     newUserInfo.setEmail(oidcUser.getEmail());

apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/spi/oidc/OidcUserInfoHolder.java

       OidcUser oidcUser = (OidcUser) principal;
       userInfo.setUserId(oidcUser.getSubject());
       userInfo.setName(oidcUser.getPreferredUsername());
+      if (!StringUtils.hasText(userInfo.getName())) {
+        userInfo.setName(oidcUser.getFullName());
+      }
       userInfo.setEmail(oidcUser.getEmail());
       return userInfo;

[nobodyiam]

I think it's reasonable, @vdisk-group what do you think?

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it has not had activity in the last 7 days. If this issue is still valid, please ping a maintainer and ask them to label it as "help wanted". Thank you for your contributions.