Select correct source when crandb and CRAN return same version.

[aramirezreyes]

This works relates to #1735

Disclaimer: I got help from cursor AI to help me understand the flow of some of these functions and critique my solutions.

I think I have a solution for the problems at the end of that discussion, but I may need some handholding and reassurance I am not breaking other cases. Could someone take a look at this?

Problem 1: when trying to install a package, if options(renv.config.crandb.enabled = TRUE), the install when crandb returns the live version of CRAN. Renv will try to build a URL to get the file from the archive. But the archive does not have that file as it is the live version.

Warning: error downloading 'https://cran.r-project.org/src/contrib/Archive/RColorBrewer/RColorBrewer_1.1.3.tar.gz' [error code 22]

Solution 1: when both repo and crandb return the same version, select the one with url (repo)

Problem 2: The version is converted to its numeric value, so when trying to build a URL, the version is incorrect: (1.1-3 is converted to 1.1.3, leading to an incorrect url).

Solution 2: leave the value untouched for building the url.

I added a test, which seems to work but I am getting a few failed tests locally. I probably do not the correct setup to run the full test suite.

[kevinushey]

Looks like tests are failing -- are you able to investigate?

[aramirezreyes]

I tried in two different R versions and I cannot reproduce the failed tests. Would you mind re-triggering the tests? I wonder if we were unlucky and crandb was unreachable. I also added a skip_if_offline(host = r-pkg.org).