title: R install.package fails on data-raw file not found
body: <p>I am building an R package, with some associated data.  I have created a data-raw folder using usethis:: functions, put various txt fies there, and built out R code to generate the .rda/Rdata files.  I have used the use_data() function to generate the .rda and Rdata files and these I can see in /data.</p>
  <p>I can retrieve these objects using load_all().</p>
  <p>I then build a source package, which generates a compressed-tar-ball.</p>
  <p>Finally I attempt to install that tar-ball/package in another project and get:</p>
  <pre><code> devtools::install_local(&quot;/home/fred/Rprojects/evidently/evidently_0.0.2.1.tar.gz&quot;)
  ✓  checking for file ‘/tmp/Rtmp53yb8S/remotes2eaf7a4fc2cb/evidently/DESCRIPTION’ ...
  ─  preparing ‘evidently’:
  ✓  checking DESCRIPTION meta-information
  ─  checking for LF line-endings in source and make files and shell scripts
  ─  checking for empty or unneeded directories
  ─  building ‘evidently_0.0.2.1.tar.gz’
     
  Installing package into ‘/home/rob/R/x86_64-pc-linux-gnu-library/4.0’
      (as ‘lib’ is unspecified)
      * installing *source* package ‘evidently’ ...
      ** using staged installation
      ** R
      ** data
      *** moving datasets to lazyload DB
      ** byte-compile and prepare package for lazy loading
      Error : **'/tmp/Rtmp0PbObQ/R.INSTALL391126f5cc7c/evidently/data-raw/TPBULET-A.txt' does not exist.**
      Error: unable to load R code in package ‘evidently’
      Execution halted
      ERROR: lazy loading failed for package ‘evidently’
      * removing ‘/home/fred/R/x86_64-pc-linux-gnu-library/4.0/evidently’
      * restoring previous ‘/home/rob/R/x86_64-pc-linux-gnu-library/4.0/evidently’
      Error: Failed to install 'evidently' from local:
        (converted from warning) installation of package ‘/tmp/Rtmp53yb8S/file2eaf5f6ca68c/evidently_0.0.2.1.tar.gz’ had non-zero exit status
      &gt; 
  </code></pre>
  <p>But the file it says it is looking for is in data-raw in the package folder.</p>
  <p>I am missing something obvious here.  I would welcome suggestions on why the system is not seeing the txt file, and why it is therefore aborting the install.</p>