Please branch and build R-rpm-macros in epel10.

`R` is already built for epel10, but without `R-rpm-macros` it is not possible to install it:


```
# dnf install R
Last metadata expiration check: 0:06:01 ago on Tue May 20 10:23:16 2025.
Error: 
 Problem: package R-4.5.0-3.el10_1.x86_64 from epel requires R-devel(x86-64) = 4.5.0-3.el10_1, but none of the providers can be installed
  - conflicting requests
  - nothing provides R-rpm-macros needed by R-devel-4.5.0-3.el10_1.x86_64 from epel
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)
```