[GEOT-7248] app-schema GetFeature numberMatched breaks with views/tab…

[NielsCharlier]

test: geoserver/geoserver#6319

…les without PK

https://osgeo-org.atlassian.net/browse/GEOT-7248

Checklist

• I have read the contribution guidelines.
• I have sent a Contribution Licence Agreement (not required for small changes, e.g., fixing typos in documentation).
• First PR targets the main branch (backports managed later; ignore for branch specific issues).
• Avoid Java 9+ split packages.
• All the build checks are green (see automated QA checks).

For core and extension modules:

• New unit tests have been added covering the changes.
• Documentation has been updated (if change is visible to end users).
• There is an issue in GeoTools Jira (except for changes not visible to end users).
• Commit message(s) must be in the form [GEOT-XYZW] Title of the Jira ticket.
• Bug fixes and small new features are presented as a single commit.
• The commit targets a single objective (if multiple focuses cannot be avoided, each one is in its own commit, and has a separate ticket describing it).

[taba90]

Looks good to me.

[aaime]

In it goes, hopefully the backport bot will create the backport PRs

[aaime]

According to chatter on the geoserver-users list, this change may have introduced a regression when concatenated columns are used instead of a database id column.

See the thread "[Geoserver-users] "org.postgresql.util.PSQLException" in geoserver 2.21.2 (not in 2.21.1)"

[NielsCharlier]

fix for regression: #4135