el8/9: Make architecture independent

[jrha]

Resolves #110.

[jouvin]

Thanks for doing this! In particular all the linting cleanup!

[jouvin]

@jrha I let you merge it, in case you still want to add something...

[jrha]

Thanks @jouvin, I've added two symlinks to preserve backwards compatibility for now.

[jrha]

I'm happy for this to be merged now if you still are.

[jouvin]

@jrha I have mixed feelings about the symlink addition. OOH it makes the changes backward-compatible which is always good. OTOH, it maintains something that is not so difficult to update and is just adding "complexity" (everything relative!). An alternative would be, IMO, not to add the symlinks but add to the release notes and README that this backward-incompatible rename was made to simplify the template library and that to use it a site has the choice to update the OS version used removing the architecture or to define the symlink. But may be it makes the life more difficult in Aquilon where the library is imported as is if I'm right...

I let you decide! Feel free to merge it after taking your decision!

[jouvin]

See my comment about added symlinks for backward compatibility

[jrha]

Definitely pros and cons either way, I think I'd like to provide the symlinks for at least one release as it definitely makes switching over in aquilon much smoother.