feat(saml): allow setting nameid-format and alternative mapping for transient format (#7979)

# Which Problems Are Solved

ZITADEL currently always uses
`urn:oasis:names:tc:SAML:2.0:nameid-format:persistent` in SAML requests,
relying on the IdP to respect that flag and always return a peristent
nameid in order to be able to map the external user with an existing
user (idp link) in ZITADEL.
In case the IdP however returns a
`urn:oasis:names:tc:SAML:2.0:nameid-format:transient` (transient)
nameid, the attribute will differ between each request and it will not
be possible to match existing users.

# How the Problems Are Solved

This PR adds the following two options on SAML IdP:
- **nameIDFormat**: allows to set the nameid-format used in the SAML
Request
- **transientMappingAttributeName**: allows to set an attribute name,
which will be used instead of the nameid itself in case the returned
nameid-format is transient

# Additional Changes

To reduce impact on current installations, the `idp_templates6_saml`
table is altered with the two added columns by a setup job. New
installations will automatically get the table with the two columns
directly.
All idp unit tests are updated to use `expectEventstore` instead of the
deprecated `eventstoreExpect`.

# Additional Context

Closes #7483
Closes #7743

---------

Co-authored-by: peintnermax <max@caos.ch>
Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

console/src/assets/i18n/en.json

@@ -2044,7 +2044,7 @@
         "DESCRIPTION": "Enter the credentials for your Apple Provider"
       },
       "SAML": {
-        "TITLE": "Sign in with Saml SP",
+        "TITLE": "Sign in with SAML SP",
         "DESCRIPTION": "Enter the credentials for your SAML Provider"
       }
     },
@@ -2177,7 +2177,10 @@
       "METADATAXML": "Metadata Xml",
       "METADATAURL": "Metadata URL",
       "BINDING": "Binding",
-      "SIGNEDREQUEST": "Signed Request"
+      "SIGNEDREQUEST": "Signed Request",
+      "NAMEIDFORMAT": "NameID Format",
+      "TRANSIENTMAPPINGATTRIBUTENAME": "Custom Mapping Attribute Name",
+      "TRANSIENTMAPPINGATTRIBUTENAME_DESC": "Alternative attribute name to map the user in case the `nameid-format` returned is `transient`, e.g. `http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress`"
     },
     "TOAST": {
       "SAVED": "Successfully saved.",

console/src/assets/i18n/nl.json

@@ -2044,7 +2044,7 @@
         "DESCRIPTION": "Voer de inloggegevens in voor uw Apple Provider"
       },
       "SAML": {
-        "TITLE": "Log in met Saml SP",
+        "TITLE": "Log in met SAML SP",
         "DESCRIPTION": "Voer de inloggegevens in voor uw SAML Provider"
       }
     },