run-checker-merge.yml: Combine no-ec2m with enable-fips

This can reveal more errors than just no-ec2m.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25731)

.github/workflows/run-checker-merge.yml

@@ -22,7 +22,7 @@ jobs:
           no-ct,
           no-dso,
           no-dynamic-engine,
-          no-ec2m,
+          no-ec2m enable-fips,
           no-engine no-shared,
           no-err,
           no-filenames,