[Feature Request] Print error message during plugin load when plugin version and H5VL_version mismatch

**Is your feature request related to a problem? Please describe.**
During a VOL object connector plugin load, when the version of the plugin set in H5VL_class_t mismatches with H5VL_version the loading phase fails silently without reporting the reason via an error message to the application.

In particular, the aforementioned code segment is the following in H5VLint.c file line 2457 in develop branch.
if (*success && cls->version != H5VL_VERSION)
*success = FALSE;

**Describe the solution you'd like**
It would be more helpful to fail with the appropriate error message to quickly discover the issue.

**Describe alternatives you've considered**

**Additional context**