chore: rename login data to login details (#11127)

# Which Problems Are Solved

For username/email + password, "login data" seems like uncommon and
confusing terminology to me.
I also think "loginname" is that, maybe it should be written like "login
name" or "username", but I'm having oversight with that now because it
seems to be the way Zitadel calls it.

Here's what Gemini has to say:

> Login Credentials: This is the most widely accepted and formal term in
the tech and security industry. A "credential" is an item of information
that confirms an identity. The pair (username/email and password) is the
set of identifiers used to authenticate the user and grant access (i.e.,
log in).
>
> Login Details: This is also very common in general use and often used
interchangeably with "login credentials," especially in user-facing
contexts (e.g., "Please enter your login details"). It is slightly less
formal than "credentials."
>
> Login Data: While technically correct (as the information is data),
this term is less specific and is more commonly used when referring to a
larger collection of information, like a file containing many users'
credentials, or the data transmitted during the login process.

# How the Problems Are Solved

Renames all occurrences of login data or login credentials to login
details.

# Additional Changes

None.

# Additional Context

I believe this is an improvement but feel free to object.

Co-authored-by: Max Peintner <[email protected]>
Co-authored-by: Ramon <[email protected]>

internal/api/ui/login/static/i18n/en.yaml

@@ -1,8 +1,8 @@
 Login:
   Title: Welcome Back!
-  Description: Enter your login data.
+  Description: Enter your login details.
   TitleLinking: Login for user linking
-  DescriptionLinking: Enter your login data to link your external user.
+  DescriptionLinking: Enter your login details to link your external user.
   LoginNameLabel: Login Name
   UsernamePlaceHolder: username
   LoginnamePlaceHolder: username@domain
@@ -13,7 +13,7 @@ Login:
 
 LDAP:
   Title: Login
-  Description: Enter your login data.
+  Description: Enter your login details.
   LoginNameLabel: Login Name
   PasswordLabel: Password
   NextButtonText: Next
@@ -30,7 +30,7 @@ SelectAccount:
 
 Password:
   Title: Password
-  Description: Enter your login data.
+  Description: Enter your login details.
   PasswordLabel: Password
   MinLength: Must be at least
   MinLengthp2: characters long.