Remove cURL in favor of using vcstool's ability to import URLs

[emersonknapp]

Replaces #328 (thanks @rotu for starting it)

vcstool can take URLs, we can simplify logic by using this instead of expecting curl installed, or configuring it with advanced options

[codecov]

Codecov Report

Merging #683 (39c7964) into master (3882d9d) will not change coverage.
The diff coverage is 25.00%.

@@           Coverage Diff           @@
##           master     #683   +/-   ##
=======================================
  Coverage   50.00%   50.00%           
=======================================
  Files           2        2           
  Lines         240      238    -2     
  Branches       52       52           
=======================================
- Hits          120      119    -1     
+ Misses        120      119    -1     

Impacted Files	Coverage Δ
src/action-ros-ci.ts	43.06% <25.00%> (-0.07%)	⬇️

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[christophebedard]

Seems like vcs doesn't handle file:// URIs as well as curl does.

I think file://D: should have an additional slash (file:///D:) on Windows. Maybe we should use this instead of simply adding a file:// prefix: https://nodejs.org/api/url.html#url_url_pathtofileurl_path.

import * as url from "url";
// ...
		return url.pathToFileURL(path.resolve(vcsRepoFileUrl)).href;

[christophebedard]

Maybe we should use this instead of simply adding a file:// prefix: nodejs.org/api/url.html#url_url_pathtofileurl_path.

I added it: 39c7964

[emersonknapp]

Thanks for fixing that!