Improve `set_golem_name()` if tests or vignettes exists

[ArthurData]

Actually golem::set_golem_name is not updating golem name in tests/ or vignettes/ if they exists. It could generate errors when we launch devtools::check()

golem::create_golem("rlop")
golem::fill_desc(
  pkg_name = "rlop", 
  pkg_title = "PKG_TITLE",
  pkg_description = "PKG_DESC.", 
  author_first_name = "AUTHOR_FIRST",
  author_last_name = "AUTHOR_LAST", 
  author_email = "[email protected]",
  repo_url = NULL
)
golem::set_golem_options()
usethis::use_mit_license("Golem User")

golem::use_recommended_tests()
usethis::use_vignette("rlop")

devtools::check()
# 0 errors ✓ | 0 warnings ✓ | 0 notes ✓

the tests/testthat.R file looks like this :

library(testthat)
library(rlop)

test_check("rlop")

and vignettes/rlop.Rmd :

---
title: "rlop"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{rplop}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```

```{r setup}
library(rlop)
```

Then if we change the golem name , we will have several kind of errors :

golem::set_golem_name(name = "plop")

devtools::check()

with vignettes/

E  creating vignettes (1.8s)
   --- re-building ‘rlop.Rmd’ using rmarkdown
   Quitting from lines 18-19 (rlop.Rmd) 
   Error: processing vignette 'rlop.Rmd' failed with diagnostics:
   there is no package called 'rlop'
   --- failed re-building ‘rlop.Rmd’
   
   SUMMARY: processing the following file failed:
     ‘rlop.Rmd’
   
   Error: Vignette re-building failed.
   Execution halted

and with tests/

── Test failures ─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── testthat ────

> library(testthat)
> library(rlop)
Error in library(rlop) : there is no package called 'rlop'
Execution halted

1 error x | 0 warnings ✓ | 0 notes ✓